[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; RI]x=
} $EZr@n
int i1=l; h5[.G!
int i2=mid+1; MA v-#
for(int cur=l;cur<=r;cur++){ '@#l/9
if(i1==mid+1) ={~A} X01
data[cur]=temp[i2++]; dz?Ey~;M
else if(i2>r) ~P9^4
data[cur]=temp[i1++]; x8&~
else if(temp[i1] data[cur]=temp[i1++]; `>`{DEDx{5
else EHt(!;?q
data[cur]=temp[i2++]; &y~GTEP
} p0HcuB)Y
} #twl
X&,a=#C^
} 5WI0[7
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改进后的归并排序: ET|4a(x
NaeG)u#+
package org.rut.util.algorithm.support; S?Uvt?
u6*mHkM
import org.rut.util.algorithm.SortUtil; #F+b^WTR
!3o]mBH8
/** fJn4'Q*U
* @author treeroot KPa&P:R3
* @since 2006-2-2 $HV`bJ5!L*
* @version 1.0 U?ZxQj66}
*/ |LE*R@|3$
public class ImprovedMergeSort implements SortUtil.Sort { ^2mCF
+VHoYEW
private static final int THRESHOLD = 10; `~LaiN.
}k6gO0z
/* 58Z,(4:E
* (non-Javadoc) _i0,?U2C
* 7[(<t+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G3t\2E9S
*/ lUHpGr|U%
public void sort(int[] data) { E\~!E20^
int[] temp=new int[data.length]; tEllkHyef
mergeSort(data,temp,0,data.length-1); Q_A?p$%;L
} @34CaZ$k
3yM!BTlX
private void mergeSort(int[] data, int[] temp, int l, int r) { YuzgR;Z
int i, j, k; L%4Do*V&
int mid = (l + r) / 2; Mj:=$}rs^
if (l == r) {c=H#- A
return; g]}E1H6-
if ((mid - l) >= THRESHOLD) >\ PNKpn{
mergeSort(data, temp, l, mid); |z.Ov&d4)(
else WOf*1C
insertSort(data, l, mid - l + 1); Fx@@.O6
if ((r - mid) > THRESHOLD) .4,l0Nn`W
mergeSort(data, temp, mid + 1, r); 3d>xg%?
else S{)'1J_0
insertSort(data, mid + 1, r - mid); B6]M\4v
y3mJO[U0 a
for (i = l; i <= mid; i++) { 9X87"
temp = data; yv.(Oy
} liVj-*m
for (j = 1; j <= r - mid; j++) { Gu K!<-Oz"
temp[r - j + 1] = data[j + mid]; p}k\l dmh{
} *7!*kqg!u
int a = temp[l]; _,E! <
int b = temp[r]; H,U qU3b3
for (i = l, j = r, k = l; k <= r; k++) { sTFRu
if (a < b) { `xu/|})KI
data[k] = temp[i++]; m#t
a = temp; (J\Qo9Il
} else { 3AarRQWsn
data[k] = temp[j--]; 1EA}[x
b = temp[j]; Pqv9>N|
} I i J%.U
} c"CF&vTp
} $4]"g}_
*qL"&h5W
/** u[1'Ap
* @param data T~-PT39E
* @param l Z/=HQ8
* @param i HXRK<6k$
*/ MNsgD3
private void insertSort(int[] data, int start, int len) { Ed&M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;p2a .P
} 4Awl
} j{;IiVHnR
} /? HLEX
} ryoD 1OE
.g95E<bd
堆排序： FR1se
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package org.rut.util.algorithm.support; .eM A*C~n
X4:SH>U!
import org.rut.util.algorithm.SortUtil; uOnyU+fZV
+#0,2wR#
/** &&{_T4
* @author treeroot [[9XqD]
* @since 2006-2-2 mRC6m K>
* @version 1.0 \j3XT}
*/ d"JI4)%
public class HeapSort implements SortUtil.Sort{ P*sb@y>}O
)K^5+oC17
/* (non-Javadoc) \l9S5%L9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CGN:=D<
*/ Dh{sVRA
public void sort(int[] data) { b0"R |d[i
MaxHeap h=new MaxHeap(); ?*)wQZt;
h.init(data); LzJNQd'
for(int i=0;i h.remove(); !)TO2?,^
System.arraycopy(h.queue,1,data,0,data.length); ,mW-O!$3W
} 8t Ef>
F B7.b
private static class MaxHeap{ 7Yd]#K{$
{pW(@4U
void init(int[] data){ q<*UeyE S
this.queue=new int[data.length+1]; \hT=U*dMR
for(int i=0;i queue[++size]=data; # ~T KC|G
fixUp(size); k->cqtG
} 4mJ[Wr\y
} p(]o#$ 6[
)rFcfS+/
private int size=0; ;NeN2|I]
74q|FQ
private int[] queue; $mp'/]
Ik74%x7G`
public int get() { I4"U/iL51
return queue[1]; QnNddCiu=
} p6e9mSs
X:Z*7P/
public void remove() { 6t(I.>-
SortUtil.swap(queue,1,size--); dY%>C75O
fixDown(1); >,. x'{
} 2Sg,b8
file://fixdown .8.LW4-ff
private void fixDown(int k) { vD*9b.*
int j; >X!A/;$
while ((j = k << 1) <= size) { Swg%[r=p=
if (j < size %26amp;%26amp; queue[j] j++; D,Jyb0BW
if (queue[k]>queue[j]) file://不用交换 -YHyJs-bU
break; lGAKHCs
SortUtil.swap(queue,j,k); />\6_kT
k = j; K<Qy1y~[
} *yxn*B_xZ
} ;iMgv5=
private void fixUp(int k) { El)WjcmH
while (k > 1) { G*lkVQ6?
int j = k >> 1; ^|0>&sTHOH
if (queue[j]>queue[k]) ?yqTLj
break; NN;'QiE
SortUtil.swap(queue,j,k); ]aF!0Fln~
k = j; 79JU
} YKT=0
} IJt8* cw
d*{NAq'9X
} -N]%)Hy
l /\n7:
} M;Dk$B{;R
HQOz
SortUtil： /Sag_[i
bAa+MB#A
package org.rut.util.algorithm; BCtm05
8S_v} NUm
import org.rut.util.algorithm.support.BubbleSort; L&2 Zn{#`
import org.rut.util.algorithm.support.HeapSort; CnA0^JX
import org.rut.util.algorithm.support.ImprovedMergeSort; AT%@T|
import org.rut.util.algorithm.support.ImprovedQuickSort; -I\Y m_)
import org.rut.util.algorithm.support.InsertSort; 8P#jC$<
import org.rut.util.algorithm.support.MergeSort; .:)nG(7f<
import org.rut.util.algorithm.support.QuickSort; Y$SwQ;wl
import org.rut.util.algorithm.support.SelectionSort; y! lEGA7
import org.rut.util.algorithm.support.ShellSort; BRg(h3 ED
^cy.iolt
/** 'U"ub2j
* @author treeroot T@ecWRro
* @since 2006-2-2 gZD,#D.hR
* @version 1.0 dUg| {l
*/ GcL:plz
public class SortUtil { xJ(4RaP
public final static int INSERT = 1; ;^K4kK&f
public final static int BUBBLE = 2; Mmu>&C\
public final static int SELECTION = 3; 7u9!:}Tu
public final static int SHELL = 4; &CEZ+\bA
public final static int QUICK = 5; "}jY;d#n
public final static int IMPROVED_QUICK = 6; =(x W7Pt~
public final static int MERGE = 7; zsZP\
public final static int IMPROVED_MERGE = 8; $stBB
public final static int HEAP = 9; u(!@6%?-
J^R#
public static void sort(int[] data) { L,B#%t
sort(data, IMPROVED_QUICK); aF~ 0\XC
} {IlX@qWr
private static String[] name={ `1eGsd,f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z`:uvEX0
}; =U_WrY<F
!VJ5(b
private static Sort[] impl=new Sort[]{ 9<ev]XaSl
new InsertSort(), rprtp5Cg
new BubbleSort(), xxN=,p
new SelectionSort(), wwtk6;8@
new ShellSort(), -%*w&',G
new QuickSort(), 0DFxVH_xN
new ImprovedQuickSort(), mar BVFz~
new MergeSort(), Xt!%W
new ImprovedMergeSort(), `f9I#B
new HeapSort() UF)4K3X
}; #l!Sz247
7Q>*]
public static String toString(int algorithm){ )Bq~1M 2
return name[algorithm-1]; smM*HDK
} C)r!;u)AZH
D/$$"AT
public static void sort(int[] data, int algorithm) { f.4m6"1
impl[algorithm-1].sort(data); HJn
} >%~%O`+
*Hnk,?kPq
public static interface Sort { FYe(SV(9
public void sort(int[] data); k>8,/ AZd
} `n# {}%
zMUifMiAj
public static void swap(int[] data, int i, int j) { $]G_^ji)K
int temp = data; ;&N;6V"}
data = data[j]; _;Q1PgT
data[j] = temp; 3\xvy{r
} PV*U4aP
} R0n#FL^E