[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; +@j@#~=K
} zS6oz=
int i1=l; w<0F-0:8
int i2=mid+1; qi&;2Yv
for(int cur=l;cur<=r;cur++){ q>E[)\+y
if(i1==mid+1) fBi6% #
data[cur]=temp[i2++]; Zdm7As]
else if(i2>r) P>i!f!o*I
data[cur]=temp[i1++]; #7Pnw.s3zz
else if(temp[i1] data[cur]=temp[i1++]; cGE,3dsF[
else uE}A-\G
data[cur]=temp[i2++]; lo!.%PP|
} ~h<<-c
} *Bse3%-v
8}^R jMgI
} rZK;=\Ot
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改进后的归并排序: ZliJc7lss
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package org.rut.util.algorithm.support; >,&@j,?']
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import org.rut.util.algorithm.SortUtil; Y]33:c_;Mo
LO&/U4:
/** G%RL8HU
* @author treeroot K4{1}bU{>
* @since 2006-2-2 ?4^8C4
* @version 1.0 [\rnJ lE
*/ C;EC4n+s
public class ImprovedMergeSort implements SortUtil.Sort { Hy9c<X[F9
\D<w:\P
private static final int THRESHOLD = 10; L2jjkyX]
"3r7/>xy
/* :9O"?FE
* (non-Javadoc) 0|^/e-^
* /p PSo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I8s%wY9
*/ ~:ldGfb|
public void sort(int[] data) { Z.iQm{bI
int[] temp=new int[data.length]; ;L{#TC(]J]
mergeSort(data,temp,0,data.length-1); Pcs62aE
} yG ,oSp|
I/HcIBJ
private void mergeSort(int[] data, int[] temp, int l, int r) { ylo/]pVs
int i, j, k; %!vgAH4
int mid = (l + r) / 2; eM1=r:jgE
if (l == r) 0YApaL+jt
return; 4L`<xX;:{
if ((mid - l) >= THRESHOLD) 0]._|Ubn6)
mergeSort(data, temp, l, mid); 2l YA% n
else t'.oty=
insertSort(data, l, mid - l + 1); )}[:.Zg,3/
if ((r - mid) > THRESHOLD) 3SMb#ce*o
mergeSort(data, temp, mid + 1, r); j/Dc';,d.(
else T]fBVA
insertSort(data, mid + 1, r - mid); TA"4yri=7x
y. A]un1
for (i = l; i <= mid; i++) { uh8+Y%V p
temp = data; OZ9ud ]@\
} KBO{g:"
for (j = 1; j <= r - mid; j++) { ,m08t9F
temp[r - j + 1] = data[j + mid]; +,H6)'#Z
} %dN',
int a = temp[l]; ]JUb;B;Z
int b = temp[r]; 3ZhB 8 P
for (i = l, j = r, k = l; k <= r; k++) { .bT+#x
if (a < b) { p^(gXzW
data[k] = temp[i++]; 5IsRIz[`TK
a = temp; YcQ3:i
} else { r{Stsha(
data[k] = temp[j--]; v)VhR2d3
b = temp[j]; i]L4kh5
} `H7V['
} TX%W-J_
} 4YmN3i
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/** zq?Iwyo
* @param data )RFE< Qcj
* @param l (K}Md~
* @param i t622b?w
*/ \i +=tGY
private void insertSort(int[] data, int start, int len) { ,M)NC%0X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~:|qdv%\
} L+b"d3!G&%
} _]Ei,Ua
} R\+O.vX
} u40k9vh
,Z"l3~0\
堆排序： GkutS.2G#
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package org.rut.util.algorithm.support; >~% _U+6
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import org.rut.util.algorithm.SortUtil; =u+.o<
5X'com?T
/** #f 4"
* @author treeroot =h"*1`
* @since 2006-2-2 j1LL[+G-"_
* @version 1.0 Q%AD6G(7
*/ ZV=)`E`I|
public class HeapSort implements SortUtil.Sort{ BU|bo")
p(5'|eqBV
/* (non-Javadoc) }k-rOi'jL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 05+uBwH
*/ :e&P's=
public void sort(int[] data) { jq4{UW'
MaxHeap h=new MaxHeap(); KLc<c1BZ
h.init(data); 'yWv @)
for(int i=0;i h.remove(); otsINAizgS
System.arraycopy(h.queue,1,data,0,data.length); ]('isq,P
} b;[u=9ez
!7:~"kk
private static class MaxHeap{ aXSTA,%
ZA;wv+hF=
void init(int[] data){ 05<MsxB"w
this.queue=new int[data.length+1]; mh4NZ @;
for(int i=0;i queue[++size]=data; )eFq0+6*)
fixUp(size); /FZ@Z]Q0G
} 9tnW:Nw~
} Ve4!MM@ti
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private int size=0; d45JT?qg&
_~M*XJ] `
private int[] queue; h4xRRyK
#nL&x3
public int get() { 8bB'[gJ]{
return queue[1]; S> f8j?n
} ~D4%7U"dv
Hm?zMyO.k
public void remove() { >Ic)RPO9
SortUtil.swap(queue,1,size--); V9 pKbX
fixDown(1); CbJ ]}Z
} ~PT(/L
file://fixdown |zV-a2K%J
private void fixDown(int k) { zl: 5_u=T
int j; x.7Ln9
while ((j = k << 1) <= size) { `]^JOw5o
if (j < size %26amp;%26amp; queue[j] j++; 8"a[W3b
if (queue[k]>queue[j]) file://不用交换 3N) bJ
break; 5o~;0K]
SortUtil.swap(queue,j,k); +fd^$Qd%K
k = j; io]e]m%
} +_8*;k@F'
} FuNc#n>
private void fixUp(int k) { 0R,?$qM\
while (k > 1) { C?bq7kD:H
int j = k >> 1; "8Ud&o
if (queue[j]>queue[k]) CQo<}}-o
break; nlsQf3
SortUtil.swap(queue,j,k); i#t)tM"
k = j; ,X&lVv#
} 9S0I<<m
} ZGHkW9b&
7_WD)Y2yS
} R=IZFwr
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} C@` eYi
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SortUtil： -{i;!XE$SR
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package org.rut.util.algorithm; ocCC63J
g_G'%{T7
import org.rut.util.algorithm.support.BubbleSort; vdloh ,
import org.rut.util.algorithm.support.HeapSort; *KO4H
import org.rut.util.algorithm.support.ImprovedMergeSort; W'2|hP
import org.rut.util.algorithm.support.ImprovedQuickSort; he0KzwBF
import org.rut.util.algorithm.support.InsertSort; $UMxO`F
import org.rut.util.algorithm.support.MergeSort; }vkrWy^
import org.rut.util.algorithm.support.QuickSort; gaaW:**y
import org.rut.util.algorithm.support.SelectionSort; Lrgv:n
import org.rut.util.algorithm.support.ShellSort; k&4@$;Ap
>&mlwxqv
/** i DV.L
* @author treeroot @Iz vObK
* @since 2006-2-2 *hVW>{a
* @version 1.0 C2;qSKG3{m
*/ &Avd
public class SortUtil { PW"G]G,
public final static int INSERT = 1; pOlo_na}[
public final static int BUBBLE = 2; w#wlZ1f
public final static int SELECTION = 3; r3oAP[+n
public final static int SHELL = 4; P g.PD,&U
public final static int QUICK = 5; nS0K&MH6B
public final static int IMPROVED_QUICK = 6; Ml` f+$
public final static int MERGE = 7; F i?2sa
public final static int IMPROVED_MERGE = 8; LuQ4TT
public final static int HEAP = 9; {dV#"+
]w.:K*_=
public static void sort(int[] data) { 8;YeEW5
sort(data, IMPROVED_QUICK); f?T6Ne'
} %"~\Pu*>
private static String[] name={ V`$Jan
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B#'TF?HUEn
}; h% BA,C
w*`5b!+/
private static Sort[] impl=new Sort[]{ hc}dS$=C
new InsertSort(), XQ&iV7
new BubbleSort(), <:)T7yVq
new SelectionSort(), Ym+k \h
new ShellSort(), w}VS mt$F
new QuickSort(), n<6p0w
new ImprovedQuickSort(), l$D]*_ jc,
new MergeSort(), v]|^.x:
new ImprovedMergeSort(), ItGi2'}
new HeapSort() _y&m4Vuu
}; i,NU%be
z5-vx`
public static String toString(int algorithm){ .a\b_[+W
return name[algorithm-1]; EzOO6
} Dk4Jg++
;u!qu$O
public static void sort(int[] data, int algorithm) { [8AGW7_
impl[algorithm-1].sort(data); PLR[nB7K
} 4`5jq)
i8pM,Ppi~
public static interface Sort { Tct8NG
public void sort(int[] data); {s!DRc]ln
} %E Jv!u*-
n5dFp%k
public static void swap(int[] data, int i, int j) { $},Y)"mI
int temp = data; N%!8I
data = data[j]; tjc3;9
data[j] = temp; PeGL Rbx34
} p%~#~5t,
} s@sRdoTdF