[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; 2@ <x%T
} 8R6!SB
int i1=l; M8,W|eTM
int i2=mid+1; -H%806NAX7
for(int cur=l;cur<=r;cur++){ uK`T1*_
if(i1==mid+1) aiKZ$KLC
data[cur]=temp[i2++]; |W/_S^C
else if(i2>r) 0O,l rF0'
data[cur]=temp[i1++]; 4ZK8Y[]Lv
else if(temp[i1] data[cur]=temp[i1++]; wM;9plYlw0
else 5$e|@/(0
data[cur]=temp[i2++]; ]tVU$9D
} <E(#;F^y
} W:7oGZ>4
Vc!;O9dP
} /Wh} ;YTv^
}D7q)_g=
改进后的归并排序: w6fVZY4
!6pOY*> j
package org.rut.util.algorithm.support; FX FTf2*T
}wh)I]]U
import org.rut.util.algorithm.SortUtil; 62&(+'$n
}/yhwijg
/** 1r?<1vh:z
* @author treeroot |8$x
* @since 2006-2-2 (=H%VXQH
* @version 1.0 ?dukK3u
*/ O6^>L0'
public class ImprovedMergeSort implements SortUtil.Sort { l!plw,PYC
&sp7YkaW
private static final int THRESHOLD = 10; P8Bv3
X;7gh>Q'4
/* &cSTem 0
* (non-Javadoc) 4dXuy>Km
* @LS*WJ< w-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wb] ha1$
*/ lEBt<
public void sort(int[] data) { ,OX(z=i_
int[] temp=new int[data.length]; #cqia0.H
mergeSort(data,temp,0,data.length-1); ;~$_A4;
} Hb KJ&^
S;[*5g6a&x
private void mergeSort(int[] data, int[] temp, int l, int r) { %&+j(?9
int i, j, k; Y. ]FVq
int mid = (l + r) / 2; 4+od N.
if (l == r) G SXe=?
return; /RuGh8qzP
if ((mid - l) >= THRESHOLD) iK$)Iy0
mergeSort(data, temp, l, mid); 'b#`8k~>
else !e?GS"L~
insertSort(data, l, mid - l + 1); O!}TZfC
if ((r - mid) > THRESHOLD) (bxSN@hp2
mergeSort(data, temp, mid + 1, r); L\Uf+d:&}G
else !F*7Mif_E
insertSort(data, mid + 1, r - mid); O+Fu zCWj
7u!i)<pn
for (i = l; i <= mid; i++) { ){|Bh3XV
temp = data; *.0}3
} 1MH[-=[Q
for (j = 1; j <= r - mid; j++) { .v36xXK(
temp[r - j + 1] = data[j + mid]; >;eWgQ6V
} aU,Zjm7fp
int a = temp[l]; (c ?OcwTH
int b = temp[r]; \f6SA{vR|
for (i = l, j = r, k = l; k <= r; k++) { %vvA'WG
if (a < b) { I @TR|
data[k] = temp[i++]; c rPEr
a = temp; .eAN`-t;
} else { QAigbSn]
data[k] = temp[j--]; G[1:<Vg8
b = temp[j]; sr+* q6W
} Q# w`ZQX3
} \WG6\Zg0A
} |*5Kfxq
?(el6J}
/** hPa:>e
* @param data ^uIP
* @param l tCAh?nR
* @param i 6eqxwj{S[
*/ f"zXiUV
private void insertSort(int[] data, int start, int len) { &v7$*n27
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cXiNO ke&
} _5(lp} s
} sK8=PZ\
} n=#AH;42
} 7F OG^
oa(R,{_*q
堆排序： nqNL[w6{
^s/HbCA
package org.rut.util.algorithm.support; !%{/eQFT4
B#Cb`b"
import org.rut.util.algorithm.SortUtil; o(GXv3L
K,{P b?
/** 'M>QA"*48E
* @author treeroot LeDty_
* @since 2006-2-2 ezn%*X y,
* @version 1.0 ]zEatY
*/ 1*\JqCR
public class HeapSort implements SortUtil.Sort{ XdX1GH*C
fvn`$
/* (non-Javadoc) n,hl6[OL7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8yEN)RqI
*/ m~cz
public void sort(int[] data) { qRkY-0vBP
MaxHeap h=new MaxHeap(); 'NyIy:
h.init(data); x%Ph``XI
for(int i=0;i h.remove(); 7\>P@s
System.arraycopy(h.queue,1,data,0,data.length); b^[Ab:`}[V
} ~.99H
qPeaSv]W
private static class MaxHeap{ u;f${Wn'3
22aS <@}
void init(int[] data){ 84v7g`lrR
this.queue=new int[data.length+1]; .{[+d3+,
for(int i=0;i queue[++size]=data; $VOSd<87
fixUp(size); HriY-=ji>a
} 7e[3Pu_/X
} *->2$uWP
bBwQ1,c$
private int size=0; '4-J0S<<_
`|maf=SnY5
private int[] queue; {;uOc{~+
5}S~8
public int get() { nBw4YDR!
return queue[1]; {~J'J$hn8
} DX>Yf}
4D+S\S0bk
public void remove() { d:C|laZHn
SortUtil.swap(queue,1,size--); 1t&LNIc|^
fixDown(1); a6\0XVU
} ~6YTm6o
file://fixdown cu{c:z~
private void fixDown(int k) { m'{gO9V
int j; /Kcp9Qx
while ((j = k << 1) <= size) { e ]-fb{oVH
if (j < size %26amp;%26amp; queue[j] j++; |q0F*\z3
if (queue[k]>queue[j]) file://不用交换 &QHZ]2%U
break; gR7in!8
SortUtil.swap(queue,j,k); D%[yAr;r
k = j; mX8k4$z
} ^n Gj 7b
} Hw"LoVh
private void fixUp(int k) { r<< ]41
while (k > 1) { M_ *KA
int j = k >> 1; S7i,oP7
if (queue[j]>queue[k]) 8EbJ5wu/%S
break; ?|4Y(0N
SortUtil.swap(queue,j,k); 'cp1I&>
k = j; CK[w0VCT
} ,#n$YT7
} #aHPB#
EWz,K]_'
} 1eod;^AP9
XT2:XWI8
} &+0WZ#VI
Tvp~~Dk
SortUtil： }6S~"<Ym
2bIP.M2Fs
package org.rut.util.algorithm; bhk:Szqz
d\eTyN'rA
import org.rut.util.algorithm.support.BubbleSort; tUOqF
import org.rut.util.algorithm.support.HeapSort; LtrE;+%2oz
import org.rut.util.algorithm.support.ImprovedMergeSort; !*I0}I ~
import org.rut.util.algorithm.support.ImprovedQuickSort; )gNS%tc*K
import org.rut.util.algorithm.support.InsertSort; h"#[{$(
import org.rut.util.algorithm.support.MergeSort; dWKjVf
import org.rut.util.algorithm.support.QuickSort; wE*o1.
import org.rut.util.algorithm.support.SelectionSort; 9NXL8QmC8
import org.rut.util.algorithm.support.ShellSort; 2TQyQ%
:8( "n1^
/** `^d[$IbDW
* @author treeroot hCpX#rg?
* @since 2006-2-2 \S5YS2,P
* @version 1.0 AFMIp^F
*/ dd?ZQ:n
public class SortUtil { ^9_4#Ep(
public final static int INSERT = 1; tJ3Hg8;
public final static int BUBBLE = 2; 3lh^maQ]
public final static int SELECTION = 3; M\m6|P
public final static int SHELL = 4; ,a6Oi=+>/U
public final static int QUICK = 5; ][D/=-
public final static int IMPROVED_QUICK = 6; 8PRKSJ[@K
public final static int MERGE = 7; (~k{aO
public final static int IMPROVED_MERGE = 8; VbU*&{j
public final static int HEAP = 9; Nbyc,a[o
xZ=6
public static void sort(int[] data) { 0,{tBo
sort(data, IMPROVED_QUICK); "pA24Ze
} yb/v?q?Fk
private static String[] name={ @Z+(J:Grm5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vx7wW<e%D
}; F/ si =%
pw, <0UhV
private static Sort[] impl=new Sort[]{ :Vnus @#r
new InsertSort(), T[(4z@d`5
new BubbleSort(), a_V.mu6h6p
new SelectionSort(), S\jIs[Dz
new ShellSort(), f.e4 C,
new QuickSort(), }LA7ku
new ImprovedQuickSort(), V#Pz`D
new MergeSort(), (_ TKDx_
new ImprovedMergeSort(), RCC~#bb
new HeapSort() bnZ`Wc*5b
}; Au"7w=G`f
C@F3iwTtp
public static String toString(int algorithm){ GZx?vSoHh
return name[algorithm-1]; h\<;N*Xi
} LX%UkfA9
6'a1]K
public static void sort(int[] data, int algorithm) { (?ofL|Cg(
impl[algorithm-1].sort(data); e$Npo<u
} O!3`^_.
>|W\8dTQ
public static interface Sort { dN)@/R^E;
public void sort(int[] data); :c/](M
} du5|/
u27*-X 5
public static void swap(int[] data, int i, int j) { z~0f[As.
int temp = data; <c!I\y
data = data[j]; u^X,ASkQ
data[j] = temp; a? <Ar#)j
} eb*w$|y6"
} yv+DM`0