[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; 4j~WrdI*
} A|BN>?.t
int i1=l; WmZ,c_
int i2=mid+1; ]VK9d;0D
for(int cur=l;cur<=r;cur++){ xO;Qr.3PX
if(i1==mid+1) fG|+!
data[cur]=temp[i2++]; BHZSc(-o
else if(i2>r) qnf\K}
data[cur]=temp[i1++]; bs_rw+
else if(temp[i1] data[cur]=temp[i1++]; (.~'\@
else .jRv8x b
data[cur]=temp[i2++]; *+<H4.W H
} ,pVq/1
} F1&7m )f$l
DWu~%U8
} "nC=.5/$
/{nZI_v#
改进后的归并排序: r }Nq"s<
wI2fCq(a0
package org.rut.util.algorithm.support; 2Q[q)u
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import org.rut.util.algorithm.SortUtil; 1DM$FG_Z-
^%Fn|U\u
/** 7dXh,sD
* @author treeroot luV_
* @since 2006-2-2 n_-k <3
* @version 1.0 Y~I6ee,\
*/ =8x-+u5}rK
public class ImprovedMergeSort implements SortUtil.Sort { MpLn)
.;NoKO7)
private static final int THRESHOLD = 10; ??XtN.]7
wm/>_
/* K${CHKFf
* (non-Javadoc) u %&4[zb
* _<l9j;6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @wW)#!Mou
*/ I}1<epd ,
public void sort(int[] data) { }3y Q*<
int[] temp=new int[data.length]; Ui;PmwQc&
mergeSort(data,temp,0,data.length-1); ,\E5et4
} WvHy}1W
`/eh
private void mergeSort(int[] data, int[] temp, int l, int r) { K<7 Db4H
int i, j, k; pqxBu
int mid = (l + r) / 2; DP4l %2m0
if (l == r) 0/?=FM>
return; k{pn~)xg
if ((mid - l) >= THRESHOLD) nokMS
mergeSort(data, temp, l, mid); %{^kmlO
else d15E$?ZLH
insertSort(data, l, mid - l + 1); BG2Z'WOH
if ((r - mid) > THRESHOLD) @!s(Zkpev
mergeSort(data, temp, mid + 1, r); BZ@v8y _TA
else Wx-rW
insertSort(data, mid + 1, r - mid); O<6!?1|KP
~aRcA|`
for (i = l; i <= mid; i++) { 7\JA8mm
temp = data; s&Qil07Vl
} !8Q9RnGn
for (j = 1; j <= r - mid; j++) { (1?k_!)T
temp[r - j + 1] = data[j + mid]; CiC@Z,ud`
} ,v*<yz/
int a = temp[l]; ED R*1!d
int b = temp[r]; =/F\_/Xw
for (i = l, j = r, k = l; k <= r; k++) { S[oRq
if (a < b) { xm}`6B^f
data[k] = temp[i++]; QzA/HP a
a = temp; 8rgNG7d
} else { %dA7`7j
data[k] = temp[j--]; b. oA}XP
b = temp[j]; 9A1w5|X
} O,!4 W\s
} 6'vt '9
} ?kM53zbT#
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/** T1pMe{
* @param data }8&L?B;90
* @param l O8S"B6?$~'
* @param i j8#B
*/ >l|dLyiae
private void insertSort(int[] data, int start, int len) { YfOO]{x,X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oi}\;TG
} `(?x@Y>.Ht
} {"w4+m~+te
} |&a[@(N:zf
} ^)|1T#Tz
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堆排序： Og3bV_,"
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package org.rut.util.algorithm.support; 9:jZ3U
mbRN W
import org.rut.util.algorithm.SortUtil; B$cx '_zF
sy.U]QG
/** NX4}o&mDwn
* @author treeroot 9b*1-1"
* @since 2006-2-2 aj*%$!SU+
* @version 1.0 zMQ|j_l9E
*/ Qr l>A*
public class HeapSort implements SortUtil.Sort{ _w>9Z>PR
cYMlcwS
/* (non-Javadoc) 4`+hX'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oy/+uw^
*/ _jCjq
public void sort(int[] data) { +A,t9 3:k
MaxHeap h=new MaxHeap(); 7lz"^
h.init(data); jNA^ (|:
for(int i=0;i h.remove(); d>qxaX;
System.arraycopy(h.queue,1,data,0,data.length); |);-{=.OdQ
} ^~%zPlv
Skd,=r
private static class MaxHeap{ y~\K~qjd
)#l,RJ(
void init(int[] data){ &D 4Ci_6k
this.queue=new int[data.length+1]; _GK3]F0
for(int i=0;i queue[++size]=data; kGSB6
fixUp(size); H:HJHd"W
} L'Fy\K\
} A_WtmG_9
&u/T,jy`
private int size=0; zWh[U'6
]o]*&[C
private int[] queue; cCH2=v4hU
X%._:st
public int get() { 9 6'{ES9D
return queue[1]; V+kU^mI
} ^l\^\>8
8+<vumnw
public void remove() { e.|_=Gd2/
SortUtil.swap(queue,1,size--); Sy<s/x^`
fixDown(1); 4W''j[Y/
} ,,>b=r_r&
file://fixdown Q+\?gU]
private void fixDown(int k) { D,rs)
int j; &LS&O
while ((j = k << 1) <= size) { C%csQ m
if (j < size %26amp;%26amp; queue[j] j++; l;dZJ_Ut$
if (queue[k]>queue[j]) file://不用交换 Ysk,9MR(F
break; WwF4`kxT
SortUtil.swap(queue,j,k); S:En9E
k = j; BEzF'<Z
} 93npzpge
} ?>W4*8(
private void fixUp(int k) { i>C:C>~
while (k > 1) { # N.(ZP
int j = k >> 1; iPxhDn<B
if (queue[j]>queue[k]) 3S'juHTe
break; x`vIY-DS
SortUtil.swap(queue,j,k); |&t 2jD(
k = j; ui:
} \&p MF
} oiq7I@Y`x
j:9kJq>mv
} < g<Lf[n$
0}UJP
} {<HL}m@kQ
6"Km E}
SortUtil： _ s]=g
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package org.rut.util.algorithm; <z*SO a
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import org.rut.util.algorithm.support.BubbleSort; #Pulbk8
import org.rut.util.algorithm.support.HeapSort; @]#0jiS
import org.rut.util.algorithm.support.ImprovedMergeSort; vRLkz4z
import org.rut.util.algorithm.support.ImprovedQuickSort; i~dW)7
import org.rut.util.algorithm.support.InsertSort; ''Y}Q"
import org.rut.util.algorithm.support.MergeSort; ?5#Ng,8iT
import org.rut.util.algorithm.support.QuickSort; 64^dy V,;
import org.rut.util.algorithm.support.SelectionSort; J2`b:%[
import org.rut.util.algorithm.support.ShellSort; T7AFL=
/]Fs3uf
/** *@q+A1P7@
* @author treeroot QM1-w^
* @since 2006-2-2 |yi3y `f
* @version 1.0 Ok+zUA[Wu
*/ '|b {
public class SortUtil { q9RCXo>Y+1
public final static int INSERT = 1; d]OoJK9&&
public final static int BUBBLE = 2; bc"E=z
public final static int SELECTION = 3; }TZ5/zn.Dw
public final static int SHELL = 4; _,i]ra{%
public final static int QUICK = 5; oVsj Q
public final static int IMPROVED_QUICK = 6; FKd5]am
public final static int MERGE = 7; L)'JkX J
public final static int IMPROVED_MERGE = 8; u:pdY'`"#
public final static int HEAP = 9; "-4V48ci
66?!"w
public static void sort(int[] data) { mAFqA
sort(data, IMPROVED_QUICK); R$&|*0
} |i"A!rW
private static String[] name={ sD$ \!7:b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )""i"/Mn
}; OYJy;u3"
bh&,*Y6=
private static Sort[] impl=new Sort[]{ ~y}M GUEC
new InsertSort(), z[DUktZl
new BubbleSort(), URDb
new SelectionSort(), ,@=qaU
new ShellSort(), O~g_rcG
new QuickSort(), Wiqy".YY
new ImprovedQuickSort(), dhN[\Z%
new MergeSort(), Ru Q\H0pr
new ImprovedMergeSort(), p;:tzH\l
new HeapSort() 2*Uwp;0
}; O`O{n_o^u
aC>r5b#:
public static String toString(int algorithm){ TRrO-
return name[algorithm-1]; 0K'lr;
} <JHU*Z
V; 1r
public static void sort(int[] data, int algorithm) { rm>;B *;
impl[algorithm-1].sort(data); v#.FK:u}
} 36JVnW;
BbZ-dXC<
public static interface Sort { D>,]EE-
public void sort(int[] data); !Y-MUZ$f
} kwdmw_
^ 3LM%B
public static void swap(int[] data, int i, int j) { h)q:nlKUW
int temp = data; PG9won5_
data = data[j]; !%NxSJ
data[j] = temp; PGMu6$
} g/so3F%v .
} D5)qmu