[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; g_l-@
} JP\jhkn
int i1=l; LNk :PD0m
int i2=mid+1; DUu:et&c1
for(int cur=l;cur<=r;cur++){ |-{ Hy(9
if(i1==mid+1) h+H+>,N8`
data[cur]=temp[i2++]; 6%6dzZ
else if(i2>r) ~1*37w~
data[cur]=temp[i1++]; xV14Y9
else if(temp[i1] data[cur]=temp[i1++]; L6nsVL&
else F^Jz
data[cur]=temp[i2++]; k^K76mB
} {*hFG:u
} 7)#JrpTj%
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} _8 K|2$X
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改进后的归并排序: Jg'#IM
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package org.rut.util.algorithm.support; PuZzl%i P3
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import org.rut.util.algorithm.SortUtil; qrw*?6mSQ
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/** *zweZG8:
* @author treeroot K-Pcew^?
* @since 2006-2-2 1qn/*9W}=
* @version 1.0 X.#9[3U+
*/ _/P;`@
public class ImprovedMergeSort implements SortUtil.Sort { F)eP55C6
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private static final int THRESHOLD = 10; Vtj*O'0
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/* ?rt[ aK
* (non-Javadoc) z)*{bz]
* 5GJkvZtFY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ='kCY}dkO
*/ o(54 A['
public void sort(int[] data) { n>Oze7hVY
int[] temp=new int[data.length]; 1 <T|
mergeSort(data,temp,0,data.length-1); %|JL=E}%|
} V:5aq.o!
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private void mergeSort(int[] data, int[] temp, int l, int r) { .7Qqs=Au
int i, j, k; pQ7elv]
int mid = (l + r) / 2; _hJ+8B^`
if (l == r) OC,yLQ
return; 4n(w{W>
if ((mid - l) >= THRESHOLD) .%W.uF^
mergeSort(data, temp, l, mid); 45%D^~2~F
else M"K$.m@t
insertSort(data, l, mid - l + 1); Xu#?Lw
if ((r - mid) > THRESHOLD) |)jR|8MAE
mergeSort(data, temp, mid + 1, r); xp3^,x;\X
else yNwSiZE X
insertSort(data, mid + 1, r - mid); UjJ&P)
p_n$}z
for (i = l; i <= mid; i++) { 6f#Mi+"
temp = data; MoiRAO
} +Gy9K
for (j = 1; j <= r - mid; j++) { FR'Nzi$
temp[r - j + 1] = data[j + mid]; L5d YTLY
} P$h) Y
int a = temp[l]; k{X+Y6'ku
int b = temp[r]; G^L9[c= ,
for (i = l, j = r, k = l; k <= r; k++) { S%?>Mh?g
if (a < b) { &dw=jHt
data[k] = temp[i++]; c@]G;>o
a = temp; D2o|.e<r
} else { 8>vNa
data[k] = temp[j--]; {uZ|Oog(p
b = temp[j]; dn=srbJ
} SV95g@
} Um`KmM3
} Ik5-ooZ&{
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/** (<OmYnm
* @param data (A}c22qe
* @param l *j1Skd.#At
* @param i !](Mt?e
*/ {~g7&+9x*
private void insertSort(int[] data, int start, int len) { Z!'kN\z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K!>3`[:I"
} }7fzEo`g
} b/#<::D `
} ib]<;t
} ^pfM/LQ@
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堆排序： l% %cU"
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package org.rut.util.algorithm.support; $'#}f?
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import org.rut.util.algorithm.SortUtil; @\-*aS_8>
l96AJB'
/** qM^y@B2MO
* @author treeroot <0l:B;3
* @since 2006-2-2 Vj)"?|V
* @version 1.0 oOXJ7|n
*/ oc-o>H
public class HeapSort implements SortUtil.Sort{ #:MoZw`rlw
R iLqMSq
/* (non-Javadoc) <x$fD37
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )kKeA
*/ 6is+\
public void sort(int[] data) { t[b(erO'
MaxHeap h=new MaxHeap(); +@@( C9
h.init(data); K TE*Du
for(int i=0;i h.remove(); wlP% U
System.arraycopy(h.queue,1,data,0,data.length); cIuCuh0I`
} $K|2k7
6p,}?6^
private static class MaxHeap{ k5)IBO
QX(t@VP
void init(int[] data){ un,W{*s8*
this.queue=new int[data.length+1]; 7:.!R^5H
for(int i=0;i queue[++size]=data; @$!"}xDR'
fixUp(size); ^M1O)
} Y$3liDeL=
} fX&g. fH
w;Pe_m7\EO
private int size=0; }L5;=A']S
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private int[] queue; <S@2%%W
;/^O7KM-
public int get() { j8t_-sU9 i
return queue[1]; D6FG$SV
} kN vNV(4
v[m1R'
public void remove() { *b1NVN$
SortUtil.swap(queue,1,size--); ?3iN)*Ut
fixDown(1); (L<G=XC
} mx^rw*'JGC
file://fixdown F@X8a/;F-
private void fixDown(int k) { YE@!`!`d:
int j; %U97{y
while ((j = k << 1) <= size) { Fi+,omB&
if (j < size %26amp;%26amp; queue[j] j++; E{}eYU
if (queue[k]>queue[j]) file://不用交换 gLg\W3TOi
break; d[ce3':z
SortUtil.swap(queue,j,k); >PygUY d
k = j; UWBR5
} ).HnK
} K5d>{c
private void fixUp(int k) { Y3luU&'
while (k > 1) { w6k^|."
int j = k >> 1; mw=keY9]
if (queue[j]>queue[k]) -.vNb!=
break; -EU~ %/=m+
SortUtil.swap(queue,j,k); nyd'79~>G
k = j; LoS%FI
} b=Q%Jxz?
} YccD^w[`B
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} N8]d0
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} u O~MT7~[X
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SortUtil： E`3[62C
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package org.rut.util.algorithm; 9'\*Ip^
&eX^ll
import org.rut.util.algorithm.support.BubbleSort; , @6_sl
import org.rut.util.algorithm.support.HeapSort; ,tOc+3Qz$
import org.rut.util.algorithm.support.ImprovedMergeSort; Pexg"328
import org.rut.util.algorithm.support.ImprovedQuickSort; )G9,5[
import org.rut.util.algorithm.support.InsertSort; WAh{*$Rpl
import org.rut.util.algorithm.support.MergeSort; -M?s<R[&
import org.rut.util.algorithm.support.QuickSort; ("@ih]zYf
import org.rut.util.algorithm.support.SelectionSort; 0o&7l%Y/
import org.rut.util.algorithm.support.ShellSort; j&=!F3[
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/** Z<tJ+
* @author treeroot R&s\h"=*
* @since 2006-2-2 EWoGdH|
* @version 1.0 J$i5A9IUr
*/ GVzG
public class SortUtil { z4c{W~}`
public final static int INSERT = 1; H9T'{R*FC
public final static int BUBBLE = 2; X9n},}bJ"
public final static int SELECTION = 3; cH\.-5NQ
public final static int SHELL = 4; u+vUv~4A6
public final static int QUICK = 5; rM(2RI4O`0
public final static int IMPROVED_QUICK = 6; 62%=%XD
public final static int MERGE = 7; <al/>7z' O
public final static int IMPROVED_MERGE = 8; ukRbSJ5a5
public final static int HEAP = 9; @,v.Y6Ge
5J8U] :Y)
public static void sort(int[] data) { elm]e2)F
sort(data, IMPROVED_QUICK); *H,vqs\}y
} N[AX]gOJ
private static String[] name={ Q>emyij
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ibskce{H
}; 8;]U:tv
p_2-(n@
private static Sort[] impl=new Sort[]{ 3)+}2
new InsertSort(), ,XNz.+Ov
new BubbleSort(), ue{0X\[P<
new SelectionSort(), r%~/y
new ShellSort(), (Y%pk76d
new QuickSort(), re\&'%~K
new ImprovedQuickSort(), Vi1= E])
new MergeSort(), OfGMeN6
new ImprovedMergeSort(), p+bT{:
new HeapSort() =h9&`iwiu
}; ns,qj}#
c)OQ_3xOs
public static String toString(int algorithm){ PF?tEw_WB
return name[algorithm-1]; 7 xm>+(
} c:MP^PWc
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public static void sort(int[] data, int algorithm) { wqLY \
impl[algorithm-1].sort(data); 'm,3znX!c
} 9My |G)M6
I&O}U|l06
public static interface Sort { h"{Z%XPX#
public void sort(int[] data); \vvV=iw
} L<**J\=7M
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public static void swap(int[] data, int i, int j) { R3SAt-IE
int temp = data; 8Yq_6
data = data[j]; o3~ecJ?k
data[j] = temp; O_jf)N\pi
} J2W:Q
} R4Vi*H