[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; w]n ,`r^
} a%3V< "f
int i1=l; ;^QG>OP$
int i2=mid+1; 1<Vc[p&
for(int cur=l;cur<=r;cur++){ K.A!?U=
if(i1==mid+1) X6_m&~}15
data[cur]=temp[i2++]; Vs>/q:I
else if(i2>r) ]-
data[cur]=temp[i1++]; 45cMG~]p
else if(temp[i1] data[cur]=temp[i1++]; | CNsa
else S;0,UgB1
data[cur]=temp[i2++]; *.g0;\HF
} 'G3;!xk$
} 6U{&`8C
{+Rf?'JZH
} ZY%]F,Y
6.]x@=Wm
改进后的归并排序: +APf[ZpU
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package org.rut.util.algorithm.support; OKDBzl
^:JZ.r
import org.rut.util.algorithm.SortUtil; >s\j/yM
eBZ^YY<*g
/** \Qa6mt2h
* @author treeroot E_VLI'Hn?
* @since 2006-2-2 x)'4u6;d
* @version 1.0 yn;h.m[):
*/ aOWE\Ic8
public class ImprovedMergeSort implements SortUtil.Sort { _O!)aD
y1DP`Ro
private static final int THRESHOLD = 10; #N`~.96
NL})_.Og
/* &w{""'
* (non-Javadoc) D;@*
* &"bcI7uGT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'B;aXy/JC
*/ CTu#KJ?j
public void sort(int[] data) { U1&pcwP
int[] temp=new int[data.length]; 7%aaqQ1T
mergeSort(data,temp,0,data.length-1); B1]5%B
} EC6&#)g;CO
#&+0hS
private void mergeSort(int[] data, int[] temp, int l, int r) { w6F'rsko]
int i, j, k; w#v8a$tT
int mid = (l + r) / 2; A?{ X5`y
if (l == r) "zSi9]j
return; p1B~:9y9X
if ((mid - l) >= THRESHOLD) xFZA18
mergeSort(data, temp, l, mid); i#I+
else i?R+Ul`Q
insertSort(data, l, mid - l + 1); V=";vRS8
if ((r - mid) > THRESHOLD) &h=O;?dO
mergeSort(data, temp, mid + 1, r); 4@6!E^
else R/)cEvB-0
insertSort(data, mid + 1, r - mid); kz]vXJ
F.P4c:GD
for (i = l; i <= mid; i++) { 7I~Ww{
temp = data; g?V>+oMx
} ,#G>&
for (j = 1; j <= r - mid; j++) { vJ*IUy
temp[r - j + 1] = data[j + mid]; HJl$v#]#+
} J[9yQ
int a = temp[l]; G{*m] 0Q
int b = temp[r]; <b74L
for (i = l, j = r, k = l; k <= r; k++) { [t55Kz*cD
if (a < b) { :>gzWVE<
data[k] = temp[i++]; d4c-(ZRl
a = temp; a\an
} else { ,: X+NQ
data[k] = temp[j--]; /H+br_D9
b = temp[j]; @DgJxY|
} XCU.tWR:
} xEBiBskd
} td^2gjr^5
/1-
/** M/GQQG;
* @param data h4CDZ
* @param l n`";ctQT
* @param i $ JI`&
*/ `_Bvaej?,
private void insertSort(int[] data, int start, int len) { 0-~Y[X"9.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8%s^>.rG
} G5W6P7-<X
} iTgGf
} =G9%Hz5~:
} O@[c*3]e
0;z-I"N
堆排序： =ECw'
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package org.rut.util.algorithm.support; Q+|8|V}w
frS1<+
import org.rut.util.algorithm.SortUtil; ~S}>|q$
hNB;29r~
/** P;[5#-e
* @author treeroot %+oWW5q7
* @since 2006-2-2 8cn)ox|J[
* @version 1.0 g|*2O}<
*/ l c)*HYqU
public class HeapSort implements SortUtil.Sort{ fq/F|c
jR7 , b5
/* (non-Javadoc) bF %#KSVw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YK*2
*/ 8[i#x|`g
public void sort(int[] data) { P_+S;(QQ~d
MaxHeap h=new MaxHeap(); DX.u"&Mm
h.init(data); ty]JUvR@
for(int i=0;i h.remove(); dDN#>|
System.arraycopy(h.queue,1,data,0,data.length); ay6G1\0W
} xP3_
X}'3N'cbkU
private static class MaxHeap{ #.p^S0\pw
lbrob' '+
void init(int[] data){ )t={+^Xe
this.queue=new int[data.length+1]; V x1C4
for(int i=0;i queue[++size]=data; FH}n]T
fixUp(size); .>>@q!!s!
} x.ZV<tDi7
} ,p\^n`A32
iRo UM.%
private int size=0; F7J-@T<
8'J>@ uW
private int[] queue; yrO'15TB
k:PO"<-U
public int get() { zR h1
return queue[1]; BDZB;DPb
} (V@g?|LZ
M$#zvcp
public void remove() { STu!v5XY}-
SortUtil.swap(queue,1,size--); +B^/ =3P
fixDown(1); /s& xI
} RL |.y~
file://fixdown 1C+Y|p?KA
private void fixDown(int k) { ])}{GW
int j; i`7{q~d=
while ((j = k << 1) <= size) { 'vj45b
if (j < size %26amp;%26amp; queue[j] j++; +Y(cs&V*
if (queue[k]>queue[j]) file://不用交换 }MY7<sMDOy
break; L q8}z-?
SortUtil.swap(queue,j,k); s`xp6\$
k = j; > C{^{?~u
} 9Am&G
} +o(t5O[G
private void fixUp(int k) { UTKS<.q
while (k > 1) { *3WK:0
int j = k >> 1; ??12 J#
if (queue[j]>queue[k]) eS fT+UL
break; JV(eHuw
SortUtil.swap(queue,j,k); 4;Z`u.1
k = j; *c7kB}/
} } IFZ$Y
} 7}-.U=tnP
sp0&"&5
} KCJ zE>
(f5!36mz
} *D #H-]9
(~xFd^W9o
SortUtil： j(F%uUpN
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package org.rut.util.algorithm; znhe]&Fw
xr?=gY3E;
import org.rut.util.algorithm.support.BubbleSort; -liVYI2s
import org.rut.util.algorithm.support.HeapSort; j]rE0Og
import org.rut.util.algorithm.support.ImprovedMergeSort; rEfk5R
import org.rut.util.algorithm.support.ImprovedQuickSort; 1c&/&6#5
import org.rut.util.algorithm.support.InsertSort; 9vCn^G%B
import org.rut.util.algorithm.support.MergeSort; Smo^/K`f9
import org.rut.util.algorithm.support.QuickSort; bB3Mpaw@
import org.rut.util.algorithm.support.SelectionSort; nf+8OH7
import org.rut.util.algorithm.support.ShellSort; yk!,{Q?<$
<%hSBDG!x
/** 'P32G?1C&p
* @author treeroot j/3827jw=
* @since 2006-2-2 "p.MJxH
* @version 1.0 ncb?iJ/b^
*/ 0`"]mYH
public class SortUtil { ?'CIt5n+\{
public final static int INSERT = 1; [%YA42_`LD
public final static int BUBBLE = 2; gC;y>YGP
public final static int SELECTION = 3; ;5=J'8f
public final static int SHELL = 4; 3m#v|52oj
public final static int QUICK = 5; K6@QZc5.!
public final static int IMPROVED_QUICK = 6; I8gGP'
public final static int MERGE = 7; D#x D-c
public final static int IMPROVED_MERGE = 8; s6OnHX\it7
public final static int HEAP = 9; G5ebb6[+
~Lhq7;=H?O
public static void sort(int[] data) { p&B98c
sort(data, IMPROVED_QUICK); hdW",Bf'
} dc5w_98o
private static String[] name={ n*CH,fih:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y"D'|i
}; _xI'p6C
T2Z;)e$m_
private static Sort[] impl=new Sort[]{ ?}m/Q"!1
new InsertSort(), <oI{:KH
new BubbleSort(), _Z.lr\
new SelectionSort(), C&bw1`XJf
new ShellSort(), ~KDx
new QuickSort(), ^6#FqK+{u
new ImprovedQuickSort(), dI5Z*"`R9
new MergeSort(), ,]i ^/fT
new ImprovedMergeSort(), '$ ~.x|
new HeapSort() jRm:9`.Q
}; P_j?V"i<
S6h=} V)
public static String toString(int algorithm){ =2s5>Oz+
return name[algorithm-1]; ~7Kqc\/H&I
} j,80EhZ
P.gk'\<k
public static void sort(int[] data, int algorithm) { /4YXx|V
impl[algorithm-1].sort(data); |0U"#xkf
} |Pz-
8U/q3@EC
public static interface Sort { @4B+<,i
public void sort(int[] data); 2"~!Pu^.j
} 7fLLV2
?t'ZX~k
public static void swap(int[] data, int i, int j) { FviLlly6
int temp = data; xH;qJRHa
data = data[j]; LU_@8i:
data[j] = temp; L5(rP\B
} 6i(V+
} W'E!5T^