[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; YJBf~0r
} mA6Nmq%{ F
int i1=l; incUa;
int i2=mid+1; .Yxf0y?uv
for(int cur=l;cur<=r;cur++){ iIU>:)i
if(i1==mid+1) "ax"k0
data[cur]=temp[i2++]; DZV U!J
else if(i2>r) oqy}?<SQ
data[cur]=temp[i1++]; Q5tx\GE
else if(temp[i1] data[cur]=temp[i1++]; ),f d,
else <O]B'Wc [
data[cur]=temp[i2++]; =kn-F T
} r#WAS2.TP
} q#.+P1"U
P6;Cohfh
} w(nQ:;oC
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改进后的归并排序: \rmge4`4
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package org.rut.util.algorithm.support; B0:/7Ld$Ml
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import org.rut.util.algorithm.SortUtil; u$mp%d8
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/** &(rR)cG
* @author treeroot Z_[jah
* @since 2006-2-2 ?a` $Y>?h
* @version 1.0 Iqb|.vLG
*/ iPt{v5}]
public class ImprovedMergeSort implements SortUtil.Sort { 4$8\IJ7G
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private static final int THRESHOLD = 10; 0vcM+}rw
3H@29TrJ+
/* e"voXe
* (non-Javadoc) ph=U<D4
* bd3q207>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S&;D
*/ XB\n4|4
public void sort(int[] data) { .l~g`._
int[] temp=new int[data.length]; *]* D^'
mergeSort(data,temp,0,data.length-1); +AL(K:
} +U,>D+
[USE&_RN
private void mergeSort(int[] data, int[] temp, int l, int r) { u YJL^I8M'
int i, j, k; &!O~ f
int mid = (l + r) / 2; !7aJfs2
if (l == r) \UBQ:+3
return; '@eH)wh@m)
if ((mid - l) >= THRESHOLD) Y(P<9m:
mergeSort(data, temp, l, mid); F(;C \[Ep
else C\; $RH
insertSort(data, l, mid - l + 1); ?\![W5uuXG
if ((r - mid) > THRESHOLD) v(z2,?/4
mergeSort(data, temp, mid + 1, r); &Ch~$Wb^
else c9R|0Yn^J
insertSort(data, mid + 1, r - mid); )>rHM6-W
{Qj7?}xW
for (i = l; i <= mid; i++) { }A'Ro/n
temp = data; BH`GUIk
} V2_I=]p_
for (j = 1; j <= r - mid; j++) { VNWa3`w
temp[r - j + 1] = data[j + mid]; b0R{cj=<[
} E>O1dPZcM
int a = temp[l]; \o{rw0w0
int b = temp[r]; t'L#8MJ
for (i = l, j = r, k = l; k <= r; k++) { Com`4>0>I
if (a < b) { n ^_B0Rkv
data[k] = temp[i++]; Z^yhSbE{5
a = temp; .?p\=C@C+
} else { rty&\u@}
data[k] = temp[j--]; IRl(H_.
b = temp[j]; +~1~f'4J
} hXz@ (cF
} 4+15`
} L\("
:Y2J7p[+
/** k;?E,!{
* @param data L64cCP*
* @param l X"3Za[9j
* @param i h5.AM?*TNd
*/ ]~-vU{
private void insertSort(int[] data, int start, int len) { ,Frdi>7 ~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OFcqouGE
} rLOdQN
} 5RhP^:i@C
} D!CuE7}
} 1rQKHC:|
S K7b]J>
堆排序： 'or8CGr^p
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package org.rut.util.algorithm.support; C#4/~+
caC(KK#<
import org.rut.util.algorithm.SortUtil; O\KSPy7YQ
~7Jj\@68
/** f!aE/e\
* @author treeroot Qv>rww]
* @since 2006-2-2 IYk^eG:;
* @version 1.0 K5SP8<.
*/ uw`fC%-xh
public class HeapSort implements SortUtil.Sort{ 26<Wg7/,
W;@9x1jKX
/* (non-Javadoc) CxRhMhvP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y;6%pm$
*/ 7O.{g
public void sort(int[] data) { dw]wQ\4B
MaxHeap h=new MaxHeap(); l9X\\uG&
h.init(data); T&PLvyBL
for(int i=0;i h.remove(); |8YP8o
System.arraycopy(h.queue,1,data,0,data.length); Ar VNynQ
} 8}(ul
-!b@\=
private static class MaxHeap{ h1 (MvEt
y:3d`E4Xw
void init(int[] data){ [Y=X^"PF
this.queue=new int[data.length+1]; ,,KGcDBj
for(int i=0;i queue[++size]=data; -S,xR5
fixUp(size); !@vM@Z"
} K:g:GEDgf
} 0x/3Xz
zr5(nAl
private int size=0; DTR/.Nr'K
s.7s:Q`
private int[] queue; lYMNx|PF
=ykOh_M
public int get() { C#A\Rfi
return queue[1]; 5zBayJh#
} d$(>=gzBQ
{!9i8T
public void remove() { wu2C!gyBo
SortUtil.swap(queue,1,size--); ST[+k
fixDown(1); 2>bV+[@B
} #RA3 T[A
file://fixdown qTl/bFD
private void fixDown(int k) { U\\nSU
int j; 0{ ;[k
while ((j = k << 1) <= size) { +\O[)\
if (j < size %26amp;%26amp; queue[j] j++; Udh!%QP%[w
if (queue[k]>queue[j]) file://不用交换 bhb*,iWA
break; !(wH}ti
SortUtil.swap(queue,j,k); 11Hf)]M
k = j; tSvklI
} U.B=%S
} {k}EWV
private void fixUp(int k) { j$8i!C
while (k > 1) { q T pvz
int j = k >> 1; {UR&Y
if (queue[j]>queue[k]) j2/3NF5&
break; sUP!'Av
SortUtil.swap(queue,j,k); 6(X5n5C
k = j; >.-$?2
} X;?Z_3I:5
} 7JNy;$]/
2m?!!Weq
} 2iM8V
Iu -CXc
} AIXvS*Y,
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SortUtil： OLdD3OI
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package org.rut.util.algorithm; J '^xDIZX
*KXg;777
import org.rut.util.algorithm.support.BubbleSort; 8uO@S*)0
import org.rut.util.algorithm.support.HeapSort; qWzzUM1=
import org.rut.util.algorithm.support.ImprovedMergeSort; l^IPN'O@
import org.rut.util.algorithm.support.ImprovedQuickSort; {vJ)!'Eh
import org.rut.util.algorithm.support.InsertSort; n6a*|rE
import org.rut.util.algorithm.support.MergeSort; l?/.uNw
import org.rut.util.algorithm.support.QuickSort; iC{~~W6
import org.rut.util.algorithm.support.SelectionSort; G{cTQH|
import org.rut.util.algorithm.support.ShellSort; kH43 T
;Q]j"1c
/** %YaUc{.%
* @author treeroot ?"aj&,q+
* @since 2006-2-2 iZy`5
* @version 1.0 L8~nx}UP5
*/ O&:0mpRZ
public class SortUtil { VhAZncw
public final static int INSERT = 1; P~+?:buqc
public final static int BUBBLE = 2; _uO#0 )l
public final static int SELECTION = 3; 'ZHu=UT7_
public final static int SHELL = 4; WLAJqmC]
public final static int QUICK = 5; >Ufjmm${
public final static int IMPROVED_QUICK = 6; ; -RhI_
public final static int MERGE = 7; W].P(A>m
public final static int IMPROVED_MERGE = 8; ,Dz2cR6
public final static int HEAP = 9; #c0 dZ
l}DCK
public static void sort(int[] data) { IKK<D'6
sort(data, IMPROVED_QUICK); K+` Vn
} :);]E-ch
private static String[] name={ sJlX]\RLQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %}=$HwN)
}; I~R<}volu
wjmZ`UMz
private static Sort[] impl=new Sort[]{ bw7!MAXd
new InsertSort(), i;0`d0^
new BubbleSort(), f$E66yG
new SelectionSort(), ~PNO|]8j
new ShellSort(), kCR)k=*
new QuickSort(), FGOa!G
new ImprovedQuickSort(), !40t:+I
new MergeSort(), I`%=&l[v_5
new ImprovedMergeSort(), c4LBlLv4
new HeapSort() e^@/Bm+B
}; WRAW%?$
(%>Sln5hq
public static String toString(int algorithm){ NEO~|B*oDU
return name[algorithm-1]; `~(C\+gUp
} x~GV#c
s9A'{F
public static void sort(int[] data, int algorithm) { er5}=cFZ
impl[algorithm-1].sort(data); =&fBmV
} F_~-o,\
33kI#45s
public static interface Sort { %6<Pt
public void sort(int[] data); O#7ldF(
} 2t { Cpw
s8|#sHT
public static void swap(int[] data, int i, int j) { A*pihBo7
int temp = data; 2H<?
data = data[j]; Xh]\q)
data[j] = temp; b,a\`%m}
} ^+[o+
} 2vnzB8"k