[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; *qL2=2
} ~/SLGyu
int i1=l; G;t<dJ8
int i2=mid+1; |yOIC,5[JW
for(int cur=l;cur<=r;cur++){ g0/R\
if(i1==mid+1) $E:z*~?
data[cur]=temp[i2++]; A9DFZZ0
else if(i2>r) vft7-|8T
data[cur]=temp[i1++]; mpDxJk!
else if(temp[i1] data[cur]=temp[i1++]; yl' IL#n]r
else r_'];
data[cur]=temp[i2++]; '{JMWNY
} n3/Bs
} g;o5m}
eK3d_bF+
} :u@ w;
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改进后的归并排序: ^eRbp?H*T
,FRa6;
package org.rut.util.algorithm.support; @1pfH\m
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import org.rut.util.algorithm.SortUtil; 3v#F0s|
5V0#_!QAN
/** +]H!q W:
* @author treeroot 9Z 6
* @since 2006-2-2 G}WY0FC6
* @version 1.0 6@(o8i
*/ (h@~0S
public class ImprovedMergeSort implements SortUtil.Sort { pnv)D}"
NZ^hp\q
private static final int THRESHOLD = 10; Y{4nBu
h2+"e# _
/* e<u~v0rDl
* (non-Javadoc) vsq |m5
* ?FZ) LZM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #xq|/JWs
*/ iNL>TVUM
public void sort(int[] data) { -7I%^u
int[] temp=new int[data.length]; 1yc$b+TH
mergeSort(data,temp,0,data.length-1); `[_p,,}Ir
} O`>u70
weOga\
private void mergeSort(int[] data, int[] temp, int l, int r) { xCu\jc)2
int i, j, k; 7<5=fYbr
int mid = (l + r) / 2; }?U #@ h
if (l == r) l>7?B2^<E
return; E,A9+OKxJ
if ((mid - l) >= THRESHOLD) d8^S~7
mergeSort(data, temp, l, mid); >+[{m<Eq
else /XuOv(j
insertSort(data, l, mid - l + 1); }%,LV]rGEZ
if ((r - mid) > THRESHOLD) 5*y6{7FLp
mergeSort(data, temp, mid + 1, r); Ee$F]NA
else EuD$^#
insertSort(data, mid + 1, r - mid); bg*@N
G|UeR=/
for (i = l; i <= mid; i++) { @`SlOKz!=
temp = data; #]wBXzu?
} pvM`j86 _
for (j = 1; j <= r - mid; j++) { 1L_(n
temp[r - j + 1] = data[j + mid]; "!o|^nN,
} 2 3A)^j
int a = temp[l]; ^QTkre
int b = temp[r]; l27J
for (i = l, j = r, k = l; k <= r; k++) { 6?l|MU"Q.
if (a < b) { DPlmrN9@=
data[k] = temp[i++]; ].N%A07
a = temp; HhUk9 >7
} else { *iVv(xXgN
data[k] = temp[j--]; DV~g
b = temp[j]; 04!akPP<
} )KN]"<jB
} u< 5{H='6
} IOH6h=
$4>x4*
/** 9P-I)ZqL
* @param data N6/;p]|
* @param l 2,'%G\QT
* @param i '# J/e0o@
*/ FzQ6UO~'
private void insertSort(int[] data, int start, int len) { &jF[f4:7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RV6|sN[x>
} q>dERN&
} 22v= A6 =
} MZ<BCRB
} qoJ<e`h}
#}nDX4jI
堆排序： 7j{63d`2
pm'i4!mY<P
package org.rut.util.algorithm.support; G/_9!lE
NAEAvXj
import org.rut.util.algorithm.SortUtil; )E=~ _`XO
hXP'NS`iv
/** Hu7WU;w
* @author treeroot <FU1|
* @since 2006-2-2 Y-:dPc{
* @version 1.0 Z oQPvs7_
*/ #TG.weTC
public class HeapSort implements SortUtil.Sort{ }FT8[m<
q `^5<
/* (non-Javadoc) 5,K*IH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vI+X9C?
*/ tLe"i>
public void sort(int[] data) { OA8iTn
MaxHeap h=new MaxHeap(); rn%q*_3-o
h.init(data); ,~qjL|9
for(int i=0;i h.remove(); mpDQhD[n
System.arraycopy(h.queue,1,data,0,data.length); h<IPV'1
} =@0/.oSD
3eJ"7sftW
private static class MaxHeap{ !O*uQB
$jgEB+
void init(int[] data){ C9%2}E3Z$)
this.queue=new int[data.length+1]; t{RdqAF
for(int i=0;i queue[++size]=data; `%A>{A"
fixUp(size); xO2CgqEb
} !_#2$J*s^D
} 9a lMC
c6f[^Q%#j
private int size=0; ?wYvBFRn7"
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private int[] queue; m(?ZNtBQt
P gK> Z,
public int get() { mj9r#v3.
return queue[1]; a2\r^fY/
} tX *}l|;(
EoD[,:*
public void remove() { RbGq$vYol/
SortUtil.swap(queue,1,size--); !$5.\D
fixDown(1); l&LrcM
} A,'JmF$d
file://fixdown 1hnw+T<<W
private void fixDown(int k) { p!]$!qHO(
int j; p{BBqKv
while ((j = k << 1) <= size) { ?YTngIa
if (j < size %26amp;%26amp; queue[j] j++; qS{E+)P
if (queue[k]>queue[j]) file://不用交换 N! N>/9
break; slWO\AYiO
SortUtil.swap(queue,j,k); "UDV4<|^k
k = j; 3Sb'){.MT+
} /9..hEq^
} 7(oX1hN
private void fixUp(int k) { ]~H\X":[>
while (k > 1) { ?6=u[))M&
int j = k >> 1; +^\TG>le
if (queue[j]>queue[k]) @CJ`T&
break; @ZUrr_|
SortUtil.swap(queue,j,k); 9X-w5$<
k = j; ,|r%tNh<8$
} wQV[ZfU^h
} ]s))O6^f
5i42o+'
} @ppT;9<d
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} Bl"BmUn
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SortUtil： dvl'Sq<
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package org.rut.util.algorithm; ~;#OQ[
s.p4+KJ
import org.rut.util.algorithm.support.BubbleSort; nGqD{!i<
import org.rut.util.algorithm.support.HeapSort; )*wM DM5q
import org.rut.util.algorithm.support.ImprovedMergeSort; -J<{NF
import org.rut.util.algorithm.support.ImprovedQuickSort; \(db1zmS~
import org.rut.util.algorithm.support.InsertSort; $yA>j (k4
import org.rut.util.algorithm.support.MergeSort; ^-&BGQM
import org.rut.util.algorithm.support.QuickSort; knsTy0]
import org.rut.util.algorithm.support.SelectionSort; sG6ts,={
import org.rut.util.algorithm.support.ShellSort; :47bf<w|Y
>-0\wP
/** ~Gz b^
* @author treeroot 3m#/1=@o
* @since 2006-2-2 BsJ d*-:X
* @version 1.0 KDX1_r=Y
*/ m/T3Um
public class SortUtil { (1pR=
public final static int INSERT = 1; nbMxQODk
public final static int BUBBLE = 2; .EF(<JC?
public final static int SELECTION = 3; )#H&lH
public final static int SHELL = 4; qq,#bRe
public final static int QUICK = 5; h|T_ k
public final static int IMPROVED_QUICK = 6; RZgklEU
public final static int MERGE = 7; x/B1\U I
public final static int IMPROVED_MERGE = 8; @F-InfB8.
public final static int HEAP = 9; <*/IV<
r+D ?_Lk
public static void sort(int[] data) { FoNkISzW
sort(data, IMPROVED_QUICK); b5@sG^
} zJ=lNb?q
private static String[] name={ ZR,"w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sMn)[k vX
}; n`Y"b&
ev'` K=n8
private static Sort[] impl=new Sort[]{ Q:5^K
new InsertSort(), nqFJNK]a
new BubbleSort(), e2><Y<
new SelectionSort(), MP3Vo|}3
new ShellSort(), u{'|/g&
new QuickSort(), 'xP&u<(F
new ImprovedQuickSort(), mM$|cge"
new MergeSort(), LJc"T)>$`
new ImprovedMergeSort(), zJ $&`=
new HeapSort() ]<xzCPB
}; %4QpDt
L7`=ec<
public static String toString(int algorithm){ z8@[]6cW
return name[algorithm-1]; ]wZlJK`K
} 0Xw$l3@N^
)yt_i'D}
public static void sort(int[] data, int algorithm) { tgVMgu
impl[algorithm-1].sort(data); x##0s5Qn
} )Ggv_mc h
T\wfYuc&X
public static interface Sort { _m.w5nJ
public void sort(int[] data); KPrH1 [VU
} Due@'
YctWSfh
public static void swap(int[] data, int i, int j) { >\o._?xSA
int temp = data; rk-GQ#SKU
data = data[j]; rQD^O4j R
data[j] = temp; M-8`zA2
} |pG%]?A
} |kGQ~:k+P