[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; #J^ >7v
} ogqKM_
int i1=l; =!u]t&yv
int i2=mid+1; gts09{"}Y
for(int cur=l;cur<=r;cur++){ hISYtNWjd"
if(i1==mid+1) +2>, -V
data[cur]=temp[i2++]; .EZ8yJj1Q
else if(i2>r) ssAGWP
data[cur]=temp[i1++]; /9o6R:B
else if(temp[i1] data[cur]=temp[i1++]; gfiFRwC`v
else w|f@sB>j
data[cur]=temp[i2++]; Hi^Z`97c
} rJ(AO'=
} Vi#[kn'
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} 6Ev+!!znu
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改进后的归并排序: V`@/"Djj
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package org.rut.util.algorithm.support; x>+sqFd\
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import org.rut.util.algorithm.SortUtil; `yh][gqVE~
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/** 5?.!A 'zb
* @author treeroot -$I$zo
* @since 2006-2-2 EAHdt=8W{
* @version 1.0 OZ/"W)
*/ H(kxRPH4@]
public class ImprovedMergeSort implements SortUtil.Sort { G 2uM6
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private static final int THRESHOLD = 10; yji>vJHu
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/* lo-VfKvy
* (non-Javadoc) 9'p*7o
* S<z8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N{<5)L~Y
*/ !Wj`U$];
public void sort(int[] data) { jOZ>^5}
int[] temp=new int[data.length]; E85TCS1
mergeSort(data,temp,0,data.length-1); AoY!f'Z
} }!"Cvu
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private void mergeSort(int[] data, int[] temp, int l, int r) { #)s +I2
int i, j, k; iLNO}EUL
int mid = (l + r) / 2; O^8=Xj#}
if (l == r) (yoF
return; ZCA= n
if ((mid - l) >= THRESHOLD) @2`nBtk
mergeSort(data, temp, l, mid); ng9_c
else Wu/:ES)C
insertSort(data, l, mid - l + 1); 7Rd(,eWE@
if ((r - mid) > THRESHOLD) qDgy7kkQ
mergeSort(data, temp, mid + 1, r); goNDS5}
else bK{ VjXF
insertSort(data, mid + 1, r - mid); uX6p^KNm5
*VUJ);7k
for (i = l; i <= mid; i++) { UG4I@@=
temp = data; IFW7MF9V
} '<'5BeU
for (j = 1; j <= r - mid; j++) { 93=?^
temp[r - j + 1] = data[j + mid]; V."cmtf
} v=cX.^L
int a = temp[l]; ~du U& \
int b = temp[r]; 7jGfQ
for (i = l, j = r, k = l; k <= r; k++) { 0}po74x*r
if (a < b) { v^ v \6uEP
data[k] = temp[i++]; At!@Rc
a = temp; `aA)n;{/2u
} else { "~KTLf
data[k] = temp[j--]; >_$_fB
b = temp[j]; [zSt+K;
} ^}`24~|y
} B~b ='jN
} uMRzUK`QK
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/** yCkX+{ki
* @param data #99=wn
* @param l 24wr=5p]Q
* @param i U }I#;*F
*/ "p+JME(
private void insertSort(int[] data, int start, int len) { ]f}(iD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )`6OSB
} [.6bxK
} B ]sVlbt
} /%)(Uz
} vP\6=71Y
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堆排序： Z~[eG"6zI
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package org.rut.util.algorithm.support; TX7dwmt)N
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import org.rut.util.algorithm.SortUtil; "<f?.l\+
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/** (*,R21<%
* @author treeroot e_g&L)
* @since 2006-2-2 ux,eY
* @version 1.0 SLp nVD:'1
*/ D(WV k
public class HeapSort implements SortUtil.Sort{ 3{$>-d
8k+k\V{
/* (non-Javadoc) `b%^_@Fb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D *IeG>%
*/ L+eK)Q
public void sort(int[] data) { @ZrNV*&<
MaxHeap h=new MaxHeap(); Hs{x Z:
h.init(data); tu/4
for(int i=0;i h.remove(); -BWWaL
System.arraycopy(h.queue,1,data,0,data.length); cl |}0Q5
} IRTWmT jT
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private static class MaxHeap{ B\qy:nr j
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void init(int[] data){ G:`So
this.queue=new int[data.length+1]; KC%&or
for(int i=0;i queue[++size]=data; CrG!8}
fixUp(size); J25/Iy*byG
} *pABdP+
} Z`|\%D%
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private int size=0; ^(@]5$^Z
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private int[] queue; /LtbmV
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public int get() { kKY,&Fn-
return queue[1]; LabI5+g
} k~F,n
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public void remove() { [xQ.qZ[h&
SortUtil.swap(queue,1,size--); 9[lk=1.qN
fixDown(1); pbIVj3-lY
} &>R:oYN
file://fixdown Vr;>Im
private void fixDown(int k) { 7|"$YV'DM
int j; JbMp /
while ((j = k << 1) <= size) { 5PP^w~n
if (j < size %26amp;%26amp; queue[j] j++; 8*|*@
if (queue[k]>queue[j]) file://不用交换 Dtyw]|L\H
break; 8i<]$
SortUtil.swap(queue,j,k); c?aOX/C'
k = j; jj]|}G
} HiD%BL>%
} $BG]is,&5
private void fixUp(int k) { f zL5C2d
while (k > 1) { = C/F26=|
int j = k >> 1; jl>wvY||
if (queue[j]>queue[k]) |cC&,8O:{
break; m Ph=bG
SortUtil.swap(queue,j,k); "?FBbJ
k = j; " BLJh)i
} NbCIL8f]
} +}:2DXy@
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} '-$cvH7_
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} c0w1 N]+Ne
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SortUtil： n36iY'<)G
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package org.rut.util.algorithm; -Rr !J37
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import org.rut.util.algorithm.support.BubbleSort; 8Z)wot
import org.rut.util.algorithm.support.HeapSort; {<#b@=G
import org.rut.util.algorithm.support.ImprovedMergeSort; jE8}Ho_#)
import org.rut.util.algorithm.support.ImprovedQuickSort; Vs Z7n~e
import org.rut.util.algorithm.support.InsertSort; qv4r!x
import org.rut.util.algorithm.support.MergeSort; <AP.m4N) _
import org.rut.util.algorithm.support.QuickSort; '+'h^
import org.rut.util.algorithm.support.SelectionSort; &qIdT;^=I
import org.rut.util.algorithm.support.ShellSort; mX?t|:[b
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/** a:4!z;2 |
* @author treeroot !DHfw-1K
* @since 2006-2-2 rEbH<|
* @version 1.0 .'h^
*/ oiD{Z
public class SortUtil { pd.unEWwF
public final static int INSERT = 1; )h{+pK
public final static int BUBBLE = 2; "D KrQ,L
public final static int SELECTION = 3; Md8<IFi9]Q
public final static int SHELL = 4; P8;1,?ou
public final static int QUICK = 5; 'q RQO(9&m
public final static int IMPROVED_QUICK = 6; +oHbAPs8
public final static int MERGE = 7; ou`KkY||
public final static int IMPROVED_MERGE = 8; =)*ZrD
public final static int HEAP = 9; Y^;izM}
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public static void sort(int[] data) { -"^xg"
sort(data, IMPROVED_QUICK); rhly.f7N=A
} E}<i?;
private static String[] name={ ~&+a.@T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C}DIm&))
}; 1TF S2R n
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private static Sort[] impl=new Sort[]{ ![J_6f}!
new InsertSort(), *O\lR-z!k
new BubbleSort(), wm9wnAy
new SelectionSort(), ;:>q;%
new ShellSort(), <P@O{Xi+K
new QuickSort(), @Pi]kWW})
new ImprovedQuickSort(), 2^w{Hcf
new MergeSort(), .[3C
new ImprovedMergeSort(), Ttp%U8-LJR
new HeapSort() /-WmOn*
}; ;d_<6|*M
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public static String toString(int algorithm){ !4 lN[
return name[algorithm-1]; 4gWlSm)
} Lw1[)Vk}E
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public static void sort(int[] data, int algorithm) { Xs'qwL~{`
impl[algorithm-1].sort(data); >$)~B4
} =^_a2_BBl
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public static interface Sort { zE?dQD^OD
public void sort(int[] data); 2v#gCou
} q:iu hI$~G
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public static void swap(int[] data, int i, int j) { !41"`D!1
int temp = data; [;ZC_fD
data = data[j]; vF>]9sMv
data[j] = temp; (A=Z,ed
} $H]NC-\+>
} whrDw1>(