[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; =f)S=0UF
} VesO/xG<
int i1=l; o3;u*f0rWn
int i2=mid+1; X-Sso9/q.
for(int cur=l;cur<=r;cur++){ EO|r
if(i1==mid+1) ))n7.pB9/
data[cur]=temp[i2++]; o(W|BD!
else if(i2>r) @"~Mglgw
data[cur]=temp[i1++]; %qzpt{'?<
else if(temp[i1] data[cur]=temp[i1++]; u+]v.Mt
else |wf:|%
data[cur]=temp[i2++]; zS:89y<
} lPS A
} t9&z|?Vz
E(T6s^8
} TsPO+x$l
ta+'*@V+G
改进后的归并排序: M} IRagm
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package org.rut.util.algorithm.support; Po[u6K2&
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import org.rut.util.algorithm.SortUtil; X$O,L[] 4
6,'!z ?d%
/** @=c{GAj
* @author treeroot ?lxI& h
* @since 2006-2-2 eiZv|?^0
* @version 1.0 auP:r
*/ i3.8m=>
public class ImprovedMergeSort implements SortUtil.Sort { [Cz.K?+#M
~Exd_c9
private static final int THRESHOLD = 10; KJa?TwnC
?ng?>!
/* 3zb;q@JV
* (non-Javadoc) y+RT[*bX5o
* VI%879Z\e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /Q"nQSG
*/ M* W=v
public void sort(int[] data) { p[e|N;W8A
int[] temp=new int[data.length]; ^zGgvFf>
mergeSort(data,temp,0,data.length-1); "7!K'i
} |}*k|
/UjRuUC]
private void mergeSort(int[] data, int[] temp, int l, int r) { NQ<~$+{
int i, j, k; I}Z[F,}*J
int mid = (l + r) / 2; -A9 !Y{Z
if (l == r) Y#PbC
return; ,{c9Lv%@J
if ((mid - l) >= THRESHOLD) #VC^><)3
mergeSort(data, temp, l, mid); (ju-r*0
else RR:m<9l
insertSort(data, l, mid - l + 1); FTt7o'U
if ((r - mid) > THRESHOLD) DR9M8E
mergeSort(data, temp, mid + 1, r); h*hV
else 9AJ!7J#v"
insertSort(data, mid + 1, r - mid); gFJ&t^yL
-e%=Mpq.
for (i = l; i <= mid; i++) { fHf+!
temp = data; Cc]s94
} 2 c'=^0:
for (j = 1; j <= r - mid; j++) { @yaBtZUp3
temp[r - j + 1] = data[j + mid]; w2~(/RgO
} o lNL|WJ`w
int a = temp[l]; `hS<F" j
int b = temp[r]; 8N(bLGUG
for (i = l, j = r, k = l; k <= r; k++) { %_1~z[Dv
if (a < b) { /-$`GT?l
data[k] = temp[i++]; Fm-W@
a = temp; 3h"; 2
} else { O6;>]/`
data[k] = temp[j--]; m7kDxs(KO
b = temp[j]; U:MkA(S%c
} <_ */
} _\"P<+!
} hzPx8sO
5vYh~|
/** "h7-nwm
* @param data hC]c =$=7
* @param l jjvm<;lv
* @param i .,,?[TI
*/ 5%?La`C9[
private void insertSort(int[] data, int start, int len) { P,iLqat
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )X\.Xr-6q
} 5DyN=[b
} F4Ft~:a
} U3lr<(r*
} |i?AtOt@f
p`1d'n[
堆排序： |gxU;"2`5~
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package org.rut.util.algorithm.support; .2 UUU\/5
~A8lvuw3
import org.rut.util.algorithm.SortUtil; vG\]xM'u
w}NgFrL
/** A i9*w?C
* @author treeroot K;6K!6J:[
* @since 2006-2-2 tb/u@}")
* @version 1.0 *&UVr
*/ y%TR2CvT
public class HeapSort implements SortUtil.Sort{ Jkm\{;
M=o,Sav5*
/* (non-Javadoc) 1a4QWGpq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +@%9pbM"z
*/ V.Xz n
public void sort(int[] data) { ~JLqx/[|s
MaxHeap h=new MaxHeap(); cw"x0 RS
h.init(data); _gC<%6#V`r
for(int i=0;i h.remove(); EemKYcE@Nr
System.arraycopy(h.queue,1,data,0,data.length); D{'Na5(
} T,7Y7MzF
lu(G3T8
private static class MaxHeap{ (P`{0^O"}
8ZG'?A+{
void init(int[] data){ #4na>G|
this.queue=new int[data.length+1]; TWx<)
for(int i=0;i queue[++size]=data; YXIDqTA+
fixUp(size); ^ ?tAt3dMI
} mkE*.I0=
} IH~H6US
2z0HB+Y}x
private int size=0; (m04Z2#
mZ/B:)_
private int[] queue; 1LPfn(
'b661,+d
public int get() { }lpcbm
return queue[1]; niy@'
} 4#2iL+
~BS*x+M
public void remove() { ~iwEhF
SortUtil.swap(queue,1,size--); AF3t#)q
fixDown(1); M8cLh!!
} _"0n.JQg
file://fixdown y\0^c5}
private void fixDown(int k) { t_]UseP$RF
int j; CdaB.xk
while ((j = k << 1) <= size) { >D:S)"
if (j < size %26amp;%26amp; queue[j] j++; 6{7O
if (queue[k]>queue[j]) file://不用交换 XIjSwR kYJ
break; G~B V^
SortUtil.swap(queue,j,k); >P0AGZ
k = j; ]NFDE-Jz]
} Gzp)OHgJ
} !%s7I^f*
private void fixUp(int k) { 6J|f^W-fs
while (k > 1) { mu{%%b7|^
int j = k >> 1; X2@o"xU
if (queue[j]>queue[k]) $}KYpSV
break; @{CpC
SortUtil.swap(queue,j,k); :>3&"T.
k = j; c(Ha"tBJ
} &PgdCijGq;
} v$tS2N2
cF(9[8c{
} 4tuEC-oh
\~?s= LT
} E?9_i :IX
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SortUtil： 8OFrW.>[
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package org.rut.util.algorithm; Y}?@Pm drz
E,6E-9
import org.rut.util.algorithm.support.BubbleSort; rk. UW
import org.rut.util.algorithm.support.HeapSort; \FKIEg+(2
import org.rut.util.algorithm.support.ImprovedMergeSort; 6op\g].P
import org.rut.util.algorithm.support.ImprovedQuickSort; RDqC$Gu
import org.rut.util.algorithm.support.InsertSort; @H_LPn
import org.rut.util.algorithm.support.MergeSort; zcZw}
import org.rut.util.algorithm.support.QuickSort; sQ)4kF&,
import org.rut.util.algorithm.support.SelectionSort; F`-[h)e.
import org.rut.util.algorithm.support.ShellSort; kcOpO<oE
@B^'W'&C
/** ]yIy~V
* @author treeroot {a_L /"7
* @since 2006-2-2 ):|)/ZiC'
* @version 1.0 ?Jr<gn^D
*/ =[jBOx&
public class SortUtil { 7J;.T%4l
public final static int INSERT = 1; =f|>7m.p
public final static int BUBBLE = 2; hy]AH)?pR
public final static int SELECTION = 3; fZ376Z:S$
public final static int SHELL = 4; KJ#c(yb9zR
public final static int QUICK = 5; d:wAI|
public final static int IMPROVED_QUICK = 6; 2 sOc]L:9
public final static int MERGE = 7; 4dok/ +Ec
public final static int IMPROVED_MERGE = 8; Qdn:4yk
public final static int HEAP = 9; -qEr-[z
W ,U'hk%
public static void sort(int[] data) { NkJ^ecn%)
sort(data, IMPROVED_QUICK); \c\=S
} ueg X
private static String[] name={ iB,*X[}EqG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U^YPL,m1
}; 8)tyn'~i
.cabw+&7
private static Sort[] impl=new Sort[]{ 7,4x7!
new InsertSort(), Rd$<R
new BubbleSort(), <'B^z0I,
new SelectionSort(), c"$_V[m
new ShellSort(), -)Vj08aP
new QuickSort(), [<`+9R
new ImprovedQuickSort(), Aa Ma9hvT!
new MergeSort(), 0x &^{P~
new ImprovedMergeSort(), 'oEmbk8Hg
new HeapSort() $+);!?^|:
}; >@%!r
x('yBf
public static String toString(int algorithm){ l^"G\ZVI
return name[algorithm-1]; GGuLxc?(
} 3TtW2h>M
h P1|l
public static void sort(int[] data, int algorithm) { #.='dSj
impl[algorithm-1].sort(data); gi6_la+
} K%k,-
4<Y?#bm'
public static interface Sort { gf=*m"5
public void sort(int[] data); Pn#Lymxh_a
} pZjFpd|
[~o3S$C&7
public static void swap(int[] data, int i, int j) { -+=8&Wa
int temp = data; Ygl!fC 4b
data = data[j]; '8JaD6W9S
data[j] = temp; 'YeJGzsJp
} OG+$F
} b2Hpuej