[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; NcBz("
} a@J/[$5
int i1=l; TOhWfl;
int i2=mid+1; ?GlXxx=eV
for(int cur=l;cur<=r;cur++){ zdw* ?C
if(i1==mid+1) OADW;fj
data[cur]=temp[i2++]; /EG'I{oC
else if(i2>r) bYoBJ #UX
data[cur]=temp[i1++]; uq;yR[w"
else if(temp[i1] data[cur]=temp[i1++]; c/igw+L()
else TyjZ
data[cur]=temp[i2++]; jZC[_p;
} I&m' a
} _-3n'i8
PfyJJAQ[
} YWs?2I
Rj4C-X4=
改进后的归并排序: ([ -i5
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package org.rut.util.algorithm.support; }Z{FPW.QK
#4lIna%VX
import org.rut.util.algorithm.SortUtil; {z\K!=X/
(^(l=EN-<
/** o.kDOqd
* @author treeroot }i,r{Y]s]
* @since 2006-2-2 V[uSo$k+>
* @version 1.0 nmts% u
*/ %<x!mE x
public class ImprovedMergeSort implements SortUtil.Sort { %1$#fxR
P%H Dz
private static final int THRESHOLD = 10; Fe4>G8uuwn
Mm(#N/
/* %1:caa@_p
* (non-Javadoc) -- FzRO{D
* JSi0-S[Y{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k_!e5c
*/ V.z8 ]iG
public void sort(int[] data) { wMj#.Jh
int[] temp=new int[data.length]; ]ly" K!1,
mergeSort(data,temp,0,data.length-1); GGhk~H4OP
} 9^ZtbmUf
#4b]j".P!n
private void mergeSort(int[] data, int[] temp, int l, int r) { TYb$+uY
int i, j, k; `CH,QT7e
int mid = (l + r) / 2; n=bdV(?4
if (l == r) 7KX27.~F
return; o{! :N>(
if ((mid - l) >= THRESHOLD) ! xG*W6IT
mergeSort(data, temp, l, mid); \Dy|}LE
else A+gS'DZ9C
insertSort(data, l, mid - l + 1); -F[@)$L
if ((r - mid) > THRESHOLD) QF\nf_X
mergeSort(data, temp, mid + 1, r); Ei):\,Nv
else FOk;=+
insertSort(data, mid + 1, r - mid); @aZTx/
P!E2.K,
for (i = l; i <= mid; i++) { 5K2K'ZkI
temp = data; {x.0Yh7
} nvT@'y+
for (j = 1; j <= r - mid; j++) { )t"-#$,@
temp[r - j + 1] = data[j + mid]; IlB8~{p_
} L/r_MtN
int a = temp[l]; &=BzsBh
int b = temp[r]; ?q9]H5\
for (i = l, j = r, k = l; k <= r; k++) { [#q]B=JB
if (a < b) { -PAEJn5$O
data[k] = temp[i++]; |Ia9bg'1U
a = temp; p/?o^_s
} else { 8"9&x} tl-
data[k] = temp[j--]; uT4|43< G
b = temp[j]; nAEyL+6U
} M@{#yEP
} P|bow+4
} -]HZ?@
* l1*zaE
/** ;_)~h$1%=
* @param data 3g;,
* @param l +Gt9!x}#e
* @param i 1QG q;6\
*/ ]FZPgO'G
private void insertSort(int[] data, int start, int len) { y'`/^>.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '2*OrY
} a @2fJ}
} [i/!ovcY
} H{vKk
} lQHF=Jex
LWT\1#
堆排序： L|T?,^
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package org.rut.util.algorithm.support; , :#bo]3
32<D9_
import org.rut.util.algorithm.SortUtil; .{h"0<x
BZ?Ck[E]Z
/** |cf-S8pwY
* @author treeroot TXmS$q
* @since 2006-2-2 d@$|zr6
* @version 1.0 pWGR#x'
*/ ]`|$nU}v
public class HeapSort implements SortUtil.Sort{ w,LmAWZ4Y
QMsq4yJ)%
/* (non-Javadoc) fUkqhqe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0X5cn 0L^
*/ <.QaOLD
public void sort(int[] data) { 7;fC%Fq
MaxHeap h=new MaxHeap(); eZa*WI=
h.init(data); #f2k*8"eAF
for(int i=0;i h.remove(); 4SJ aAeIZ
System.arraycopy(h.queue,1,data,0,data.length); OL>>/T
} *x|%Nua"
7@fS2mu
private static class MaxHeap{ #5@(^N5p`
lx%c&~.DiB
void init(int[] data){ M\C9^DX{
this.queue=new int[data.length+1]; Nrr}) g
for(int i=0;i queue[++size]=data; Ak9{P`
fixUp(size); Z^&G9I#
} B>^6tdz
} n[iwi
^?`fN'!p
private int size=0; Swhz\/u9
9j>2C
private int[] queue; vn^O m-\
G<$:[ +w
public int get() { @-!P1]V|
return queue[1]; #:gd9os :
} )=[\YfK
T(D6'm:X
public void remove() { @(sz"
SortUtil.swap(queue,1,size--); <eG|`
fixDown(1); f=F:Af!
} A*y4<'}<
file://fixdown 2d[q5p
private void fixDown(int k) { L/tpT?$fi
int j; ?$f.[;mh
while ((j = k << 1) <= size) { 4H-eFs%5
if (j < size %26amp;%26amp; queue[j] j++; yxt"vm;
if (queue[k]>queue[j]) file://不用交换 L@S\ rImw
break; 4>jHS\jc
SortUtil.swap(queue,j,k); O2{["c e
k = j; SH?McBxS
} #Q8_:dPY
} f1 x&Fk
private void fixUp(int k) { .5 .(S^u
while (k > 1) { Z@0tZ^V{
int j = k >> 1; ?.46X^
if (queue[j]>queue[k]) XjGS.&'I
break; >&PM'k
SortUtil.swap(queue,j,k); jq,M1
k = j; &jF'2D^_
} *-nO,K>y`
} \)~d,M}kK
el9P@r0
} mAW.p=;
r N$0qo
} g-sNYd%?a
/4an@5.\C
SortUtil： p3=Py7iz
m)tu~neM
package org.rut.util.algorithm; JQ1MuE'
]/=RABi
import org.rut.util.algorithm.support.BubbleSort; S0^a)#D &
import org.rut.util.algorithm.support.HeapSort; 7S a9
import org.rut.util.algorithm.support.ImprovedMergeSort; C t,p
import org.rut.util.algorithm.support.ImprovedQuickSort; ^^N|:80
import org.rut.util.algorithm.support.InsertSort; Jl~ *@0(
import org.rut.util.algorithm.support.MergeSort; ( eTrqI`
import org.rut.util.algorithm.support.QuickSort; zC2:c"E I
import org.rut.util.algorithm.support.SelectionSort; BPO5=]W 7
import org.rut.util.algorithm.support.ShellSort; X0;u7g2Yz
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/** !?P8[K
* @author treeroot xuK"pS
* @since 2006-2-2 \?xM%(:<Q
* @version 1.0 V"YeF:I
*/ A(FnU:
public class SortUtil { FCEy1^u
public final static int INSERT = 1; %~!4DXrMk
public final static int BUBBLE = 2; 1+FVM\<&
public final static int SELECTION = 3; q?}C`5%D
public final static int SHELL = 4; k[r^@|
public final static int QUICK = 5; vE:*{G;Y
public final static int IMPROVED_QUICK = 6; keAoJeG,J
public final static int MERGE = 7; EQm{qc;
public final static int IMPROVED_MERGE = 8; &: Q'X
public final static int HEAP = 9; a^R?w|zCX
Bh3F4k2bg7
public static void sort(int[] data) { }>@\I^Xm,
sort(data, IMPROVED_QUICK); !Km[Qw k-
} eYUb>M)
private static String[] name={ V]zc-gYI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &<F9Z2^
}; l_h:S`z.
:ppaq
private static Sort[] impl=new Sort[]{ F)^0R%{C
new InsertSort(), :21d
new BubbleSort(), xi5"?*&Sb
new SelectionSort(), <V&0GAZ
new ShellSort(), oYqHl1cs
new QuickSort(), ;,f\Wf"BW
new ImprovedQuickSort(), ~|+ ~/
new MergeSort(), #PkuCWm6
new ImprovedMergeSort(), W@d&X+7e
new HeapSort() QLd*f[n
}; m!<HZvq?vf
N'`X:7fN
public static String toString(int algorithm){ 'ITq\1z
return name[algorithm-1]; Q~,Mzt"}W
} P<PZ4hNx
sA2-3V<t8
public static void sort(int[] data, int algorithm) { *] ihc u
impl[algorithm-1].sort(data); jWrU'X
} X)b$CG
P[3i!"O>
public static interface Sort { =~1EpZ
public void sort(int[] data); r:H]`Uo'r
} .&^p@A~
6w^P{%ul
public static void swap(int[] data, int i, int j) { (/]'e}
int temp = data; Z8SwW<{ $
data = data[j]; 2v{WX
data[j] = temp; FLi'}C
} 6<lo0PQ"Z
} x92^0cMf