[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; 6@ ^`-N;
} pYUkd!K"
int i1=l; |F{E4mg(o
int i2=mid+1; rPvX8*)tV
for(int cur=l;cur<=r;cur++){ ,;pX.Ob U
if(i1==mid+1) V*uu:
data[cur]=temp[i2++]; t U=b~
else if(i2>r) }eFUw
data[cur]=temp[i1++]; ?o5#Ve$-X
else if(temp[i1] data[cur]=temp[i1++]; @@mW+16
else vUx$[/<
data[cur]=temp[i2++]; yzb&
} @Hdg-f>y]
} > 0)`uJ
VZbIU[5
} ?Cfp=85ea!
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改进后的归并排序: Pm;*Jv%
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package org.rut.util.algorithm.support; F ) ~pw
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import org.rut.util.algorithm.SortUtil; `^k<.O
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/** TsW6w
* @author treeroot _?LI0iIFx
* @since 2006-2-2 yZaDNc9'
* @version 1.0 0%j;yzQ<
*/ }U1shG[
public class ImprovedMergeSort implements SortUtil.Sort { Qh%vh;|^
jN>UW}?
private static final int THRESHOLD = 10; Jn&>Z? @
e;r-}U
/* D|3QLG
* (non-Javadoc) CGl+!t{
* irj}:f;!eF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |ema-pRC
*/ , )3+hnFY
public void sort(int[] data) { 2dW-WHaM
int[] temp=new int[data.length]; G)|HFcE
mergeSort(data,temp,0,data.length-1); jF85bb$
} 5z]KkPQ
)X$n'E
private void mergeSort(int[] data, int[] temp, int l, int r) { =DwH*U/YR
int i, j, k; o;C)!
int mid = (l + r) / 2; Qnh1su5
if (l == r) yE{UV>ry
return; 4zbV' ]
if ((mid - l) >= THRESHOLD) io_64K+K
mergeSort(data, temp, l, mid); b?L43t,
else 9 NSYrIQ"
insertSort(data, l, mid - l + 1); j'cCX[i
if ((r - mid) > THRESHOLD) vA~hkkj{
mergeSort(data, temp, mid + 1, r); R$`T"C"
else o%Q2.
insertSort(data, mid + 1, r - mid); Ll48)P{+}V
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for (i = l; i <= mid; i++) { OZ9j3Q;a$
temp = data; k5CIU}H"
} tvCTC ey
for (j = 1; j <= r - mid; j++) { 8#-}3~l[
temp[r - j + 1] = data[j + mid]; `P*j~ZLlXN
} /^ 7 9|$E
int a = temp[l]; kIo?<=F8T
int b = temp[r]; y%Ah"UY
for (i = l, j = r, k = l; k <= r; k++) { aKcV39brr
if (a < b) { * OFT)S
data[k] = temp[i++]; o62gLO]z@
a = temp; wj~8KHan
} else { J1MnkxJmpQ
data[k] = temp[j--]; #R|4(HlL
b = temp[j]; b~echOj
} +Q&@2 oY"
} u:?RdB}B_@
} ]xs\,}I%
NKYyMHv6
/** zaPR>:r0
* @param data CcETS}Q0C
* @param l Pfy;/}u^c
* @param i ^r$5];n
*/ $yJfAR
private void insertSort(int[] data, int start, int len) { ga%77t|jm3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q"uu&JC
} aW5~z^I
} i?9Lf
} Pw1H)<X
} kp"cHJNx
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堆排序： AP@d2{"m}
#}?$mxME*
package org.rut.util.algorithm.support; F@3,>~[%I
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import org.rut.util.algorithm.SortUtil; ]P^ +~
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/** =wc[r?7
* @author treeroot Hq8.O/Y"=
* @since 2006-2-2 G9Ezm*I;:
* @version 1.0 ST.W{:X
*/ qxh\umm+2
public class HeapSort implements SortUtil.Sort{ b2H6}s"=w
9!h+LGs(,
/* (non-Javadoc) euK!JZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .quc i(D
*/ cd#TKmh7re
public void sort(int[] data) { -`o:W?V$u
MaxHeap h=new MaxHeap(); X_2I4Jz]6
h.init(data); ['<rfK
for(int i=0;i h.remove(); k5M(Ve
System.arraycopy(h.queue,1,data,0,data.length); "m5ZZG#R`
} v-qS 'N4
dRmTE
private static class MaxHeap{ yKJp37R
_>l,%n
void init(int[] data){ A 78{b^0*
this.queue=new int[data.length+1]; zvWQ&?&o2
for(int i=0;i queue[++size]=data; 38^_(N
fixUp(size); SQK6BEjE8
} llJ)u!=5
} 0Jrk(k!
wAYc)u#
private int size=0; hJ :+*46
m? hX=
private int[] queue; ap!<8N
oY: "nE
public int get() { ;MD{p1w
return queue[1]; 3 -FNd~%
} `)fGw7J {
|v&&%>A2
public void remove() { )Ec;krb+
SortUtil.swap(queue,1,size--); s+11) ~
fixDown(1); }, H,ky
} ]]4E)j8
file://fixdown ^C{a'
private void fixDown(int k) { ~qF9*{~!
int j; f#jAjzmYL
while ((j = k << 1) <= size) { zb(u?U
if (j < size %26amp;%26amp; queue[j] j++; +TX]~k79Oq
if (queue[k]>queue[j]) file://不用交换 =&'j;j
break; WUWQcJj
SortUtil.swap(queue,j,k); FtXEudk
k = j; tKs0]8tc
} HT'dft #
} H#D=vx'
private void fixUp(int k) { I{$|Ed1
while (k > 1) { _ U\vHa$#
int j = k >> 1; sQvEUqy9
if (queue[j]>queue[k]) KqQrxi?f-
break; ^B/{
SortUtil.swap(queue,j,k); rRW&29A
k = j; &wfM:a/c
} |V&k1{V
} 2#^[`sFPO
P\R3/g
} tg:x}n
V/Tp&+Z.c
} WJ@,f%=<~
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SortUtil： -?[:Zn~$a
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package org.rut.util.algorithm; ;Baf&xK
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import org.rut.util.algorithm.support.BubbleSort; Q. >"@c[
import org.rut.util.algorithm.support.HeapSort; J=sQ].EK
import org.rut.util.algorithm.support.ImprovedMergeSort; 4_ 3\4
import org.rut.util.algorithm.support.ImprovedQuickSort; G2rvi=8=
import org.rut.util.algorithm.support.InsertSort; <8Ad\MU
import org.rut.util.algorithm.support.MergeSort; Nuj%8om6
import org.rut.util.algorithm.support.QuickSort; J_,y?}.e3
import org.rut.util.algorithm.support.SelectionSort; 8K qv)FjB
import org.rut.util.algorithm.support.ShellSort; !O\r[c
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/** {`:!=
* @author treeroot R]dB Uu
* @since 2006-2-2 I4$a#;
* @version 1.0 ,SBL~JJ
*/ &lD4-_2J
public class SortUtil { 4 ClW*l
public final static int INSERT = 1; C1_NGOvT
public final static int BUBBLE = 2; QwiC2}/
public final static int SELECTION = 3; ~ rRIWfhb
public final static int SHELL = 4; q+z,{K
public final static int QUICK = 5; #Rs7Ieu+
public final static int IMPROVED_QUICK = 6; OG.`\G|
public final static int MERGE = 7; s=q}XIWK
public final static int IMPROVED_MERGE = 8; k3Y>QN|q8
public final static int HEAP = 9; -Fb/GZt|
y ^YrGz.
public static void sort(int[] data) { S7V;sR"V2
sort(data, IMPROVED_QUICK); Uc&0>_Z
} 49CMRO,T
private static String[] name={ ^E9@L??
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :Q%&:[2
}; mU*GcWbc+
? in&/ZrB
private static Sort[] impl=new Sort[]{ PiN3t]2
new InsertSort(), #2}S83 k
new BubbleSort(), L%"&_v#a^
new SelectionSort(), ?p5Eo{B
new ShellSort(), 2oNlQiE_
new QuickSort(), Yd@9P2C
new ImprovedQuickSort(), nX
new MergeSort(), h"[ ][
new ImprovedMergeSort(), >IRo]-,
new HeapSort() YpiSH(70`
}; pDu~84!])
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public static String toString(int algorithm){ 7|2:;5:U
return name[algorithm-1]; re<"%D
} 9Y7 tI3
-V9Cx_]y
public static void sort(int[] data, int algorithm) { 4X^0:.bT&
impl[algorithm-1].sort(data); wc;5tb#
} L-fAT'!'
'+`CwB2
public static interface Sort { (\]_/ W
public void sort(int[] data); REHfk6YE
} -wY6da*.W
%o5GD
public static void swap(int[] data, int i, int j) { Dgdh3q;
int temp = data; k|w6&k3
data = data[j]; j@9A!5<CCk
data[j] = temp; TiH(HW|:
} $u>^A<TBN
} U\51j