[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; 6,>$Jzs)5E
} A@A8xn%
int i1=l; ;uBGB h<
int i2=mid+1; w1/QnV
for(int cur=l;cur<=r;cur++){ oD2:19M@p
if(i1==mid+1) _{[6hf4p
data[cur]=temp[i2++]; 6}"%>9
else if(i2>r) )+_Vx}O:}
data[cur]=temp[i1++]; qG9a!sj
else if(temp[i1] data[cur]=temp[i1++]; KF%BX~80C
else y;b#qUd5a
data[cur]=temp[i2++]; m#_BF#
} AyE*1 FD
} @{/)k%U
"Z.6@ c7
} p{Lrv%-j
)z[C=
改进后的归并排序: ,^/Wv!uPE
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package org.rut.util.algorithm.support; =pL$*`]?
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import org.rut.util.algorithm.SortUtil; (TZK~+]@sb
"qmSwdM
/** *C_A(n5"V
* @author treeroot mskG2mA
* @since 2006-2-2 4.O)/0sU
* @version 1.0 XZE(& (s
*/ G5}_NS/
public class ImprovedMergeSort implements SortUtil.Sort { b}! cEJY
)D8op;Fn
private static final int THRESHOLD = 10; UmR)L!QT8
8eXeb|?J
/* XGa8tI[:X
* (non-Javadoc) l.}PxZ
* ,6^<Vg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `OW'AS |
*/ Rhc:szDU
public void sort(int[] data) { &[G)YD
int[] temp=new int[data.length]; H:.~! r
mergeSort(data,temp,0,data.length-1); 2yfU]`qN
} lNX*s E .
}B0[S_mw
private void mergeSort(int[] data, int[] temp, int l, int r) { <"3q5ic/Z
int i, j, k; [jgVN w""D
int mid = (l + r) / 2; UC`h o%OBF
if (l == r) KL$.E!d
return; >|3Y+X
if ((mid - l) >= THRESHOLD) ?!RbS#QV}
mergeSort(data, temp, l, mid); f^pBXz9&=
else 7KgaXi3r
insertSort(data, l, mid - l + 1); EQyX!
if ((r - mid) > THRESHOLD) nCYz];".
mergeSort(data, temp, mid + 1, r); =xk>yw!O)
else FGVw=G{r
insertSort(data, mid + 1, r - mid); 72l:[5ccR
}a"=K%b<\
for (i = l; i <= mid; i++) { A$2 ;Bf
temp = data; 64'2ICf#m
} O=%Ht-kOc
for (j = 1; j <= r - mid; j++) { ?`RlYu
temp[r - j + 1] = data[j + mid]; /pF8S!,z
} d+DO}=]
int a = temp[l]; vu( 5s
int b = temp[r]; A@?0(
for (i = l, j = r, k = l; k <= r; k++) { @b(@`yz.a
if (a < b) { h0F=5| B
data[k] = temp[i++]; Z_GGH2u
a = temp; kFjv'[Y1N
} else { dA<%4_WZty
data[k] = temp[j--]; }83 8F&
b = temp[j]; .$\-{)
} 2J=`"6c
} =%` s-[5b
} xP\s^]e
[8'?G5/n
/** -mO#HZIq
* @param data q^xG%YdPz+
* @param l "M/c0`>C!i
* @param i ';R]`vWFe
*/ QGN+f)
private void insertSort(int[] data, int start, int len) { 2TGND-(j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -;cF)C--12
} (BY 0b%^
} lJ3VMYVrUP
} @lB{!j&q
} A;8kC}
jU-LT8y:
堆排序： 3I 0pHP5
q 4Pv\YO
package org.rut.util.algorithm.support; / =9Y(v
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import org.rut.util.algorithm.SortUtil; (Z<@dkO?)
|&K;*g|a
/** OV{v6,>O
* @author treeroot :2j`NyLI.
* @since 2006-2-2 RQ=rB9~:ZN
* @version 1.0 U*+-#
*/ 18X?CoM~
public class HeapSort implements SortUtil.Sort{ h1S)B|~8
(?Ko:0+*
/* (non-Javadoc) Ucv7`W gr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h] ho? K
*/ _#\Nw0{
public void sort(int[] data) { lL zR5445)
MaxHeap h=new MaxHeap(); < }K9 50
h.init(data); {N]WVp*R
for(int i=0;i h.remove(); :?~)P!/xl5
System.arraycopy(h.queue,1,data,0,data.length); 8(`e\)%l0
} $'l<2h>4
?Tc|3U
private static class MaxHeap{ rn .qs
T[4xt,[a
void init(int[] data){ (A=PDjP!
this.queue=new int[data.length+1]; #pZeGI|'J
for(int i=0;i queue[++size]=data; _1)n_P4
fixUp(size); A@o7
} .4]XR/I$
} A$p&<#
z#G\D5yX[*
private int size=0; ~AD>@;8fG
YnnK]N;\x
private int[] queue; ;40Z/#FI
f\5w@nX
public int get() { 2<*"@Vj
return queue[1]; od#Lad@p
} XOX$uLm
4x ?NCD=k
public void remove() { ], Bafz)4
SortUtil.swap(queue,1,size--); 2{RRaUoRb
fixDown(1); ([<{RjPb
} W?SAa7+
file://fixdown I;}U/'RR>
private void fixDown(int k) { ^+-QY\N j
int j; Mxw-f4j
while ((j = k << 1) <= size) { QeF:s|[
if (j < size %26amp;%26amp; queue[j] j++; Ak3^en
if (queue[k]>queue[j]) file://不用交换 F4~OsgZ'N
break; cAN8'S(s1
SortUtil.swap(queue,j,k); n',7=~
k = j; wmV=GV8 d
} MMk9rBf
} 2Bi]t%<{
private void fixUp(int k) { i-w<5pGnf
while (k > 1) { Q.9,W=<6
int j = k >> 1; L+ew/I>:
if (queue[j]>queue[k]) q5Zu'-Cx@
break; 6Z1O:Bou
SortUtil.swap(queue,j,k); `yq) y>_
k = j; pS-o*!\C.
} r;b`@ .
} Y->sJm
)0I-N)
} +|;Ri68
V|A.M-XLv4
} t ^>07#z
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SortUtil： Q~"Lyy8
/Q W^v;^
package org.rut.util.algorithm; SeZ+&d
el<Gd.p.d
import org.rut.util.algorithm.support.BubbleSort; 1\Bh-tzB
import org.rut.util.algorithm.support.HeapSort; auIW>0?}
import org.rut.util.algorithm.support.ImprovedMergeSort; [-Z 6QzT
import org.rut.util.algorithm.support.ImprovedQuickSort; Z*P/ubV'
import org.rut.util.algorithm.support.InsertSort; \1-lda
import org.rut.util.algorithm.support.MergeSort; {R(/Usg!=
import org.rut.util.algorithm.support.QuickSort; A'![*O
import org.rut.util.algorithm.support.SelectionSort; fN{wP,jI
import org.rut.util.algorithm.support.ShellSort; }JOz,SQHP
5O~xj:
/** I;AS.y
* @author treeroot ^x*J4jl
* @since 2006-2-2 :9&@/{W
* @version 1.0 pHk$_t
*/ 6`7`herE}
public class SortUtil { _\+0e:Ae
public final static int INSERT = 1; ?mV2|;
public final static int BUBBLE = 2; `r&Ui%fk;0
public final static int SELECTION = 3; ~eTp( XG
public final static int SHELL = 4; x!85P\sm
public final static int QUICK = 5; o4 "HE*
public final static int IMPROVED_QUICK = 6; 1Z_]Ge<a
public final static int MERGE = 7; .rg "(I
public final static int IMPROVED_MERGE = 8; O>f*D+A-
public final static int HEAP = 9; 4]zn,g?&
902A,*qq
public static void sort(int[] data) { EhD%
sort(data, IMPROVED_QUICK); h`Ej>O7m
} =|O]X|y-lZ
private static String[] name={ >yenuqIKQv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?N+pWdi
}; _ZWU~38PM
6V9r[,n
private static Sort[] impl=new Sort[]{ IY~I=}
new InsertSort(), }|-8-;
new BubbleSort(), B~Z61
new SelectionSort(), j AoI`J
new ShellSort(), "AqLR
new QuickSort(), `{yD\qDyX
new ImprovedQuickSort(), +|oLS_
new MergeSort(), e?XGv0^qu
new ImprovedMergeSort(), &9Z@P[f
new HeapSort() R))4J
}; ~yngH0S$[b
Zq: }SU
public static String toString(int algorithm){ zb~;<:<
return name[algorithm-1]; ^755LW
} ]We0 RD"+
g C8deC8
public static void sort(int[] data, int algorithm) { S"+#=C
impl[algorithm-1].sort(data); 7 mA3&<&q
} *c.w:DkfB
>)[W7h
public static interface Sort { #RdcSrw)W!
public void sort(int[] data); HWL? doM
} 0|hOoO]?q&
v-F|#4Q=ut
public static void swap(int[] data, int i, int j) { E^w0X,0XlE
int temp = data; 0ikA@SAq
data = data[j]; : @gW3'
data[j] = temp; e'v_eD T^
} /lHs]) ,
} <g&GIFE,