[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!4xE
} v m)'CC
int i1=l; H\ONv=}7I
int i2=mid+1; 'w!8`LPu
for(int cur=l;cur<=r;cur++){ &{(8EvuDd
if(i1==mid+1) ~7"6Y]
data[cur]=temp[i2++]; ~#V1Gunq
else if(i2>r) ts~$'^K[-
data[cur]=temp[i1++]; iMXK_O%
else if(temp[i1] data[cur]=temp[i1++]; SM8m\c
else TCS^nBEE
data[cur]=temp[i2++]; +)QA!g$
} =[G)
} 5"8R|NU:\0
{GM8}M~D&
} SWM6+i p
]#Q'~X W
改进后的归并排序: FAP1Bm
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package org.rut.util.algorithm.support; h2#S ?
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import org.rut.util.algorithm.SortUtil; 32ae? d
m=p<.%a
/** 1$adX
* @author treeroot +)7Yqh#$
* @since 2006-2-2 ]6 vqgu
* @version 1.0 Lmw{ `R
*/ \~`qE<Q/
public class ImprovedMergeSort implements SortUtil.Sort { 0&|,HK
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private static final int THRESHOLD = 10; *) ?Fo
?5#=Mh#
/* 8/* 6&#-
* (non-Javadoc) b1`(f"&l
* 4<QSot
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lg!{?xM
*/ Pw_[{LL
public void sort(int[] data) { O`W&`B(*k
int[] temp=new int[data.length]; j2"Y{6c
mergeSort(data,temp,0,data.length-1); b(McH*_8e
} GDj ViAFm
%xWscA%^u
private void mergeSort(int[] data, int[] temp, int l, int r) { %Jc>joU
int i, j, k; x#s=eeP1
int mid = (l + r) / 2; VIjsz42C
if (l == r) 58 Rmq/6s
return; W9ewj:4\0
if ((mid - l) >= THRESHOLD) sCF7K=a
mergeSort(data, temp, l, mid); xr\wOQ*`
else @YfCS8 eH
insertSort(data, l, mid - l + 1); Cq,hzi-
if ((r - mid) > THRESHOLD) >4}2~;
mergeSort(data, temp, mid + 1, r); !^*I?9P
else <r{ )*]#l
insertSort(data, mid + 1, r - mid); k(v8zDq*
* 5Y.9g3)Q
for (i = l; i <= mid; i++) { KU}HVM{
temp = data; Kzd`|+?'`M
} h7H#sL[^
for (j = 1; j <= r - mid; j++) { 'of5v6:8
temp[r - j + 1] = data[j + mid]; v|v^(P,o
} JV#)?/a$z
int a = temp[l]; H21\6 GY
int b = temp[r]; 4f?Y'+>Z,
for (i = l, j = r, k = l; k <= r; k++) { +=bGrn>h
if (a < b) { &i~AXNw
data[k] = temp[i++]; De*Z UN|<
a = temp; n|oAfJUk,
} else { T8i9
data[k] = temp[j--]; ZP&"[_
b = temp[j]; "wPFQXU
} "jUr[X2J
} K$..#]\TM
} B R-(@
)2P4EEs[
/** 6QOdd6_d
* @param data y'<juaw
* @param l K"sfN~@rT[
* @param i KR6*)?c`
*/ NgnHo\)
private void insertSort(int[] data, int start, int len) { *L9s7RR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T$'GFA
} ?wR;"
} wxg`[c$:
} RJ_ratKN*g
} <(Wa8PY2(
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堆排序： g&*pk5V>
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package org.rut.util.algorithm.support; 3?vasL
QJ ueU%|
import org.rut.util.algorithm.SortUtil; <~}t;ji
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/** t/bDDV"
* @author treeroot VT\o=3_
* @since 2006-2-2 o4b!U%
* @version 1.0 ogX'3L
*/ 4><b3r;T'
public class HeapSort implements SortUtil.Sort{ pX]*&[X?
{37DrSOa
/* (non-Javadoc) S< <xlW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8IH&=3
*/ gkuI!=
public void sort(int[] data) { Mc9P(5Bf
MaxHeap h=new MaxHeap(); _gY so]S^B
h.init(data); KZL5>E
for(int i=0;i h.remove(); @$~ BU;kR
System.arraycopy(h.queue,1,data,0,data.length); FG~p_[K
} 6$>m s6g%
N1KYV&'o
private static class MaxHeap{ SPIYB/C
<=V2~ asB
void init(int[] data){ $.}fL;BzVz
this.queue=new int[data.length+1]; aho;HM$hjP
for(int i=0;i queue[++size]=data; | %af}# FQ
fixUp(size); q0 :Lb
} DsqsMlB{
} ` BH8v
k3[ ~I'
private int size=0; Ou; ]>FJ
XQ<2(}]4
private int[] queue; `OnN12`
n]x4twZ
public int get() { JBa=R^k
return queue[1]; YizJT0$
} mj<(qZh
{W}.z
public void remove() { %#NaM\=8v
SortUtil.swap(queue,1,size--); sb_>D`>
fixDown(1); +V&b<y;?>
} ;0}$zy1EZ
file://fixdown WZRrqrjq
private void fixDown(int k) { W;,.OoDc>
int j; pN&Dpz^
while ((j = k << 1) <= size) { g!7/iKj:
if (j < size %26amp;%26amp; queue[j] j++; DT(A~U<y
if (queue[k]>queue[j]) file://不用交换 v|jBRKU99
break; E`>-+~ZUsk
SortUtil.swap(queue,j,k); {so"xoA^c
k = j; K/G|MT)
} /yIkHb^c
} /Z>#lMg\.
private void fixUp(int k) { 'oHtg @
while (k > 1) { KEsMes(*
int j = k >> 1; ~,Q+E8
if (queue[j]>queue[k]) K(Otgp+zb
break; C$)#s{*
SortUtil.swap(queue,j,k); pq>"GEN
k = j; anA>'63
} -zHJ#
} GS~jNZx
%Md;=,a:6
} Cdiu*#f
5_M9T3
} ZSYXUFz
c3!d4mC:
SortUtil： g`gH]W FcG
F%6al,8P
package org.rut.util.algorithm; PR~ho&!
uI-te~]
import org.rut.util.algorithm.support.BubbleSort; "sf8~P9qy
import org.rut.util.algorithm.support.HeapSort; rO 6oVz#x
import org.rut.util.algorithm.support.ImprovedMergeSort; ;04doub
import org.rut.util.algorithm.support.ImprovedQuickSort; sxl29y^*
import org.rut.util.algorithm.support.InsertSort; `#2}[D
import org.rut.util.algorithm.support.MergeSort; 2#ha Icm"
import org.rut.util.algorithm.support.QuickSort; rayC1#f
import org.rut.util.algorithm.support.SelectionSort; ?bQ~+M\
import org.rut.util.algorithm.support.ShellSort; Az6f I*yP
_7]* 5Pxo
/** >!wX%QHH
* @author treeroot &K)c*'l
* @since 2006-2-2 {Rjj
* @version 1.0 s{KwO+UW
*/ 6I72;e^!
public class SortUtil { 4'?kyTO~
public final static int INSERT = 1; [Pby d
public final static int BUBBLE = 2; pb}QP
public final static int SELECTION = 3; e!ar:>T
public final static int SHELL = 4; vz,l{0v
public final static int QUICK = 5; .'p_j(uv
public final static int IMPROVED_QUICK = 6; #G|iEC0C
public final static int MERGE = 7; <y\>[7Y
public final static int IMPROVED_MERGE = 8; L$l'wz
public final static int HEAP = 9; G*mk 19Z
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public static void sort(int[] data) { d;9 X1`"
sort(data, IMPROVED_QUICK); QOEcp% 6I}
} xg/3*rL
private static String[] name={ 6N:fq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `K~300-hOb
}; ;->(hFJt
5sEq`P}5
private static Sort[] impl=new Sort[]{ B@A3T8'
new InsertSort(), TNUzNA
new BubbleSort(), GTNN4
new SelectionSort(), nv*q N\i'
new ShellSort(), QW|,_u5j
new QuickSort(), vEvVT]g[V
new ImprovedQuickSort(), 9Rzu0:r.,
new MergeSort(), &2Q4{i
new ImprovedMergeSort(), tV9nC
new HeapSort() SI*O#K=w
}; w8kp6_i'
#)tt}GX
public static String toString(int algorithm){ N{tNe-5
return name[algorithm-1]; pz6fL=Xd
} My76]\Psh
n87B[R
public static void sort(int[] data, int algorithm) { x;99[C!$
impl[algorithm-1].sort(data); 7pMrYIP
} V?t^ J7{'
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public static interface Sort { gb|C592R5C
public void sort(int[] data); 9h<];
} fl!8\4
g[0b>r7
public static void swap(int[] data, int i, int j) { D1;H,
int temp = data; D?)91P/R
data = data[j]; u=5&e)v3
data[j] = temp; <6)Ogv",
} &#F>%~<or
} * h!gjbi