[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; <b *sn]l
} 9M($_2,44
int i1=l; VoUo!t:(+
int i2=mid+1; QD3tM5(Yr
for(int cur=l;cur<=r;cur++){ P%Vq#5
if(i1==mid+1) a:l-cZ/!
data[cur]=temp[i2++]; uJH[C>
else if(i2>r) \X\f~CB
data[cur]=temp[i1++]; | ?vm.zp
else if(temp[i1] data[cur]=temp[i1++]; K,! V _
else Z- a
data[cur]=temp[i2++]; h/|p`MP\1
} Pf,@U'f|
} d8agM/F*/
^vT!24sK
} VZr:yE
H I_uR$m
改进后的归并排序: Ng!d6]
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package org.rut.util.algorithm.support; N8Zz6{rp
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import org.rut.util.algorithm.SortUtil; (&Lt&i _
1,;zX^
/** 6YNL4HE?
* @author treeroot qF`6l(
* @since 2006-2-2 =z"+)N
* @version 1.0 jZkc yx
*/ ti%RE:*
public class ImprovedMergeSort implements SortUtil.Sort { %aw.o*@:
gELG/6l
private static final int THRESHOLD = 10; kD;pj3o&"2
^Z;zA@[wt
/* AnX<\7bc}
* (non-Javadoc) ZfqN4
* 6MY<6t0a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'n-y*f
*/ UQ0<sI=
public void sort(int[] data) { 7XyCl&Dc:
int[] temp=new int[data.length]; #6ePwd
mergeSort(data,temp,0,data.length-1); _ pz}
} DZC@^k \E
8aWEl%
private void mergeSort(int[] data, int[] temp, int l, int r) { h ':ZF
int i, j, k; lTq"j?#E]m
int mid = (l + r) / 2; e*lL.
if (l == r) M:}u|
return; b=/'cQ
if ((mid - l) >= THRESHOLD) EI 35&7(
mergeSort(data, temp, l, mid); r#4/~a5i~
else UWKgf? _
insertSort(data, l, mid - l + 1); Rb0I7~Z%'d
if ((r - mid) > THRESHOLD) 0]
mergeSort(data, temp, mid + 1, r); oS..y($TI
else io+V4m
insertSort(data, mid + 1, r - mid); _7;:*'>a4
8vR_WHsL
for (i = l; i <= mid; i++) { v '+]T=
temp = data; %2zmc%]r
} gHstdp_3
for (j = 1; j <= r - mid; j++) { 7LVG0A2>7
temp[r - j + 1] = data[j + mid]; <OGG(dI
} If,p!L
int a = temp[l]; (VjU,'h
int b = temp[r]; Is7BJf
for (i = l, j = r, k = l; k <= r; k++) { R'tKJ_VI
if (a < b) { rniM[7K
data[k] = temp[i++]; [DM0'4
a = temp; ^ UmYW
} else { z.SC^/\o|
data[k] = temp[j--]; bqAW
b = temp[j]; [#q>Aq$11
} s<FBr,
} l^Rb%?4Z
} LQ# E+id&
C{zp8 A(Dh
/** [rT.k5_
* @param data s4"OsgP+
* @param l -<6?ISF2
* @param i v wEbGx
*/ nlNk
private void insertSort(int[] data, int start, int len) { qt~=47<d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :HO5 T
} z2uL[deN'"
} Fa )QDBz)
} *$<W"@%^J
} R^*baiXVI
}LT&BNZj
堆排序： dg24h7|]
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package org.rut.util.algorithm.support; (6S'wb
+1y$#~dl
import org.rut.util.algorithm.SortUtil; ]A3
t+8e?="
/** \c:$eF
* @author treeroot PVo7Sy!'H
* @since 2006-2-2 9aJIq{`E
* @version 1.0 VIT|#
*/ LWF,w7v[L
public class HeapSort implements SortUtil.Sort{ r\;fyeH
:D)(3U5
/* (non-Javadoc) gQ>kDl^$Ls
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HYfGu1j?X
*/ m[B#k$
public void sort(int[] data) { @vt.Db
MaxHeap h=new MaxHeap(); 9RJF
h.init(data); DpT9"?g7
for(int i=0;i h.remove(); g|>LT_
System.arraycopy(h.queue,1,data,0,data.length); sCFxn
} i3,IEN
Mqr_w!8d
private static class MaxHeap{ !5o j~H
e|\xFV=4
void init(int[] data){ gA!@oiq@
this.queue=new int[data.length+1]; i7Up AHd/
for(int i=0;i queue[++size]=data; }uZs)UQ|$
fixUp(size); y QW7ng7D0
} \l~^dn}
} RRIh;HhX
|vI`u[P
private int size=0; ?;ok9Y
-&5YRfr!
private int[] queue; aTuu",f
-fq
public int get() { K($l>PB,y@
return queue[1]; l_^SU8i57
} W,<q!<z\t
!!y]pMjJa@
public void remove() { t}YcB`q)
SortUtil.swap(queue,1,size--); ?*fY$93O
fixDown(1); vk92j?
} b6N[t _,
file://fixdown S(zp_
private void fixDown(int k) { ;Bs~E
int j; C`[<6>&y
while ((j = k << 1) <= size) { 8:,($a/KF
if (j < size %26amp;%26amp; queue[j] j++; kFn/dQ4|
if (queue[k]>queue[j]) file://不用交换 @8|*Ndx2
break; MuoE~K2
SortUtil.swap(queue,j,k); q!$s<n
k = j; ]vvYPRV76
} bhqSqU}6~
} 7Y5r3a}%
private void fixUp(int k) { &lQ%;)'
while (k > 1) { 'ToE Y3
int j = k >> 1; y[8;mCh
if (queue[j]>queue[k]) D'g,<-ahl
break; :ky`)F`
SortUtil.swap(queue,j,k); wjA wJOw|
k = j; >JyS@j}
} H7zN|NdNw
} jRJG .hcB5
+%JBr+1#\
} 5=pE*ETJ
Q^(CqQo!<
} P.Z:`P)
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SortUtil： !dLu($P
2J7|y\N,
package org.rut.util.algorithm; p F-Lz<V
0!hr9Y]Lx
import org.rut.util.algorithm.support.BubbleSort; v(1 [n]y
import org.rut.util.algorithm.support.HeapSort; o(*\MTt?
import org.rut.util.algorithm.support.ImprovedMergeSort; `6Bx8CZ'I
import org.rut.util.algorithm.support.ImprovedQuickSort; x4MmBVqp
import org.rut.util.algorithm.support.InsertSort; 5h5izA'0'
import org.rut.util.algorithm.support.MergeSort; v e&d"8+]
import org.rut.util.algorithm.support.QuickSort; 7>N~l
import org.rut.util.algorithm.support.SelectionSort; |P >"a`
import org.rut.util.algorithm.support.ShellSort; azPH~'E'
{^N,=m\
/** u8Ys2KLpL
* @author treeroot 2n<Mu Q]
* @since 2006-2-2 Qs&;MW4q
* @version 1.0 G4* LO
*/ #Rw!a#CX.
public class SortUtil { 2u3Kyn
public final static int INSERT = 1; K10G+'H^
public final static int BUBBLE = 2; h `Lr5)B'
public final static int SELECTION = 3; S!(3-{nC
public final static int SHELL = 4; '`>%RZ]
public final static int QUICK = 5; cQ8[XNa
public final static int IMPROVED_QUICK = 6; ~gDYb#p
public final static int MERGE = 7; F.[%0b E
public final static int IMPROVED_MERGE = 8; lLD#|T3
public final static int HEAP = 9; \V? .^/
Q:-T'xk@
public static void sort(int[] data) { TnF~'RZYb
sort(data, IMPROVED_QUICK); )DgXsT
} 1G>Ud6(3<
private static String[] name={ %'Cj~An
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {9@D zP
}; &6eo;8 `U
2W,9HSu8
private static Sort[] impl=new Sort[]{ orGMzC2
new InsertSort(), ={g)[:(C.
new BubbleSort(), )UzJ2Pa<+_
new SelectionSort(), rzfLp
new ShellSort(), IW~R{ ]6
new QuickSort(), ] ZV[}7I.
new ImprovedQuickSort(), 6/UOzV,[
new MergeSort(), `Fd \dn
new ImprovedMergeSort(), gRLt0&Q~
new HeapSort() qM\ 2f<)
}; ^^a6 (b
.5|[gBK
public static String toString(int algorithm){ ,PeR}E;c
return name[algorithm-1]; ~y<0Cc3Vs
} thjr1y.e
Z)@vJZ*7(
public static void sort(int[] data, int algorithm) { \5ls <=S.
impl[algorithm-1].sort(data); n7t}G'*Y!^
} _.5{vGyxr
'OY4Q'Z
public static interface Sort { &Hoc`u
public void sort(int[] data); >h7(kj:
} yE:y[k0E
|E8sw a
public static void swap(int[] data, int i, int j) { y=Y k$:-y
int temp = data; Ac:`xk<
data = data[j]; UqK.b}s
data[j] = temp; ]s\r3I]
} *:%&z?<Fw
} !0;AFv`\