[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; h0O t>e"
} MfA@)v
int i1=l; /Bw <?:
int i2=mid+1; q)j_QbW)
for(int cur=l;cur<=r;cur++){ TKe\Bi
if(i1==mid+1) :*} -,{uX
data[cur]=temp[i2++]; \]8F_K
else if(i2>r) v8} vk]b
data[cur]=temp[i1++]; .sCj3sX*
else if(temp[i1] data[cur]=temp[i1++]; VtN1 [}
else \'Q rJ ?D
data[cur]=temp[i2++]; CBr(a'3{Z
} 3%[;nhbA7
} SNJSRqWL/
dM=45$\q
} J6I:UML
[} zzG@g,J
改进后的归并排序: kz\Ss|jl
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package org.rut.util.algorithm.support; lHUd<kEC
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import org.rut.util.algorithm.SortUtil; bEKhU\@=J
Lc#GBaJ
/** 2{Y~jYt{h
* @author treeroot z?^oy.
* @since 2006-2-2 re~T,PPM
* @version 1.0 ZfMs6`Wv 1
*/ KTq+JT u
public class ImprovedMergeSort implements SortUtil.Sort { 6Hp+?mmh
>t_h/:JZ)
private static final int THRESHOLD = 10; "2~L
_70Z1_;
/* @V&c=8)8
* (non-Javadoc) g\% Z+Dc
* AU1U?En
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E|vXM"zFl
*/ [=BccT:b
public void sort(int[] data) { ,gpZz$Ef(
int[] temp=new int[data.length]; rJ)j./c
mergeSort(data,temp,0,data.length-1); ZZn$N-
} BW:HKH.k
Kh$Q9$
private void mergeSort(int[] data, int[] temp, int l, int r) { Yb=77(QV
int i, j, k; 3=Q:{
int mid = (l + r) / 2; =%B5TBG
if (l == r) 6_s(Kx>j
return; |M&4[ka}
if ((mid - l) >= THRESHOLD) 3K=%I+G(4
mergeSort(data, temp, l, mid); p0[+Zm{#l
else K9{RU4<
insertSort(data, l, mid - l + 1); H$+@O-
if ((r - mid) > THRESHOLD) <D[0mi0
mergeSort(data, temp, mid + 1, r); ]OtnekkK$
else ]"&](e6*
insertSort(data, mid + 1, r - mid); Mg~4) DW]
yQ)&u+r
for (i = l; i <= mid; i++) { A;<wv>T
temp = data; gYCr,-_i
} 31~nay15
for (j = 1; j <= r - mid; j++) { 9Pb6Z}
temp[r - j + 1] = data[j + mid]; L#",.x
} :r(dMU3%
int a = temp[l]; <5?pa3
int b = temp[r]; o_1N "o%
for (i = l, j = r, k = l; k <= r; k++) { $g^D1zkuDT
if (a < b) { "[eH|z/
data[k] = temp[i++]; Z5E; FGPb
a = temp; WfD fj
} else { EV?U !O
data[k] = temp[j--]; T](}jQxj`
b = temp[j]; RG*Vdom
} $AT@r"
} o]Xt2E
} ?ac4GA(
Vr|e(e.%
/** u&w})`+u5
* @param data "M, 1ElQ
* @param l $~S~pvT
* @param i ~nTj't2R
*/ kU+|QBA@
private void insertSort(int[] data, int start, int len) { Zwm/c]6`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W#%s0EN<_
} f1]zsn:
} @0'U p
} 9vz\R-un
} EJ>&\Iq
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堆排序： qiB~
D#G%WT/"
package org.rut.util.algorithm.support; >{N}UNZ$}
c:.~%AJx
import org.rut.util.algorithm.SortUtil; ^nK<t?KS
FJDE48Vi
/** <sw@P":F
* @author treeroot {"+M%%`*#
* @since 2006-2-2 +U1 Ir5Lx
* @version 1.0 MoE&)~0u&
*/ tEL9hZzI
public class HeapSort implements SortUtil.Sort{ veHe
w`;HwK$ ,
/* (non-Javadoc) fz\Q>u'T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UXlZI'|He
*/ *I)J%#
public void sort(int[] data) { uN:KivVe
MaxHeap h=new MaxHeap(); HeO:=OE~>
h.init(data); kDE-GX"Y
for(int i=0;i h.remove(); ~\mh\a&
System.arraycopy(h.queue,1,data,0,data.length); i1|>JM[V
} .G8>UXX
K J\kR
private static class MaxHeap{ 6q\*{_CPB
v&|65[<
void init(int[] data){ `Bw]PO
this.queue=new int[data.length+1]; "bIb?e2h9G
for(int i=0;i queue[++size]=data; X+C*+k,z
fixUp(size); a8f#q]TyQ
} ~g\~x
} rNR7}o~qo
&yvvea]
private int size=0; F)(^c
!JDr58
private int[] queue; ;U|(rM;
$uZmIu9Bi+
public int get() { `R$i|,9)
return queue[1]; Vw1>d+<~-)
} }! EVf
dgjK\pH`h
public void remove() { Cjx4vP
SortUtil.swap(queue,1,size--); ;NR|Hi]
fixDown(1); A<ds+0
} *qwN9b/!
file://fixdown Qz,2PO
private void fixDown(int k) { c1"wS*u
int j; &h0LWPl
while ((j = k << 1) <= size) { -;7xUNQ
if (j < size %26amp;%26amp; queue[j] j++; "_q~S$i^
if (queue[k]>queue[j]) file://不用交换 SvT0%2
break; 1o`1W4Q
SortUtil.swap(queue,j,k); E ?Mgbd3
k = j; I&{T 4.B:U
} s`jlE|jtN
} n.&7lg^X
private void fixUp(int k) { SO=gG 2E
while (k > 1) { xgcxA:
int j = k >> 1; Cgx:6TRS
if (queue[j]>queue[k]) &{V|%u}v
break; gS5REC4I/
SortUtil.swap(queue,j,k); !?nO0Ao-$
k = j; KClkPL!jP
} y#j7vO
} 4<i#TCGex3
~t)cbF(UO
} fAgeF$9@
rO7_K>g?
} u%~'+=
)2Ei<
SortUtil： hOwb
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package org.rut.util.algorithm; gsbr8zwG,
=&z+7Pe[
import org.rut.util.algorithm.support.BubbleSort; 2y - QH
import org.rut.util.algorithm.support.HeapSort; &VGV0K3Dp
import org.rut.util.algorithm.support.ImprovedMergeSort; MY,~leP&
import org.rut.util.algorithm.support.ImprovedQuickSort; '4 *0Pw
import org.rut.util.algorithm.support.InsertSort; 1.du#w
import org.rut.util.algorithm.support.MergeSort; dd
import org.rut.util.algorithm.support.QuickSort; V: D;?$Jl
import org.rut.util.algorithm.support.SelectionSort; "V' r}>
import org.rut.util.algorithm.support.ShellSort; &DWSf`:Hx
+]eG=. u
/** J"C9z{[Z&
* @author treeroot AioW*`[WjA
* @since 2006-2-2 ij$NTY=u
* @version 1.0 ubM1Qr
*/ ZaYiby@Ci
public class SortUtil { g8Ex$,\,
public final static int INSERT = 1; .;4N:*hY
public final static int BUBBLE = 2; 9^XZ|`
public final static int SELECTION = 3; ^Kz?SO
public final static int SHELL = 4; I?'*vAW<
public final static int QUICK = 5; 8\rca:cF
public final static int IMPROVED_QUICK = 6; #yochxF_
public final static int MERGE = 7; ~6f/jCluR%
public final static int IMPROVED_MERGE = 8; G'\[dwD,u
public final static int HEAP = 9; yv4x.cfI2W
\6|y~5Hw{r
public static void sort(int[] data) { 1eD#-tzV
sort(data, IMPROVED_QUICK); pTCD1)
} k+9F;p7
private static String[] name={ \p(S4?I7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t`8Jz~G`
}; |8'}mjs.Q
9WG=3!-@
private static Sort[] impl=new Sort[]{ ,/?J!W@m
new InsertSort(), oJTEN}fL
new BubbleSort(), Ak?9a_f
new SelectionSort(), M2Nh3ijr
new ShellSort(), 4;6"I2;zfG
new QuickSort(), =3035{\
new ImprovedQuickSort(), sWlxt qg
new MergeSort(), @&m [w'tn
new ImprovedMergeSort(), NPH(v`
new HeapSort() bo=H-d|
}; ~rV$.:%va
[)I^v3]U
public static String toString(int algorithm){ S%\5"uGa
return name[algorithm-1]; oDZZ
} TB>_#+:
aH"d~Y^
public static void sort(int[] data, int algorithm) { #`_W?-%^
impl[algorithm-1].sort(data); K6->{!8]k
} Tv|'6P
=8l' [
public static interface Sort { DghyE`
public void sort(int[] data); &u:U"j
} spA|[\Nl
96\FJHtZ
public static void swap(int[] data, int i, int j) { $*{,Z<|2
int temp = data; ;l;jTb^l
data = data[j]; fQ9af)d
data[j] = temp; )zWu\JRp
} (Mfqzy
} TIp\-