[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; ~*Qpv&y)
} m9@n
int i1=l; 17oxD
int i2=mid+1; Rn_c9p
for(int cur=l;cur<=r;cur++){ 9lCKz !E
if(i1==mid+1) V&H8-,7z
data[cur]=temp[i2++]; (02(:;1
else if(i2>r) w>_EM&r6~u
data[cur]=temp[i1++]; nh)R
else if(temp[i1] data[cur]=temp[i1++]; `F8;{`a
else w.p'Dpw
data[cur]=temp[i2++]; qhtAtP>i"
} {W<-f?
} jqWvLBU!
^6>|!
} ~+yo;[1Yc
wf%Ep#^6}
改进后的归并排序: Els=:4
[uQZD1<q
package org.rut.util.algorithm.support; J94YMyOo
d|RmU/)
import org.rut.util.algorithm.SortUtil; |LE++t*X~
GQq'~Lr5
/** e622{dfVS
* @author treeroot v^fOT5\
* @since 2006-2-2 1o78e2B
* @version 1.0 :0/o?'s
*/ mp3_n:R?
public class ImprovedMergeSort implements SortUtil.Sort { x)ZH;)
}Xv1KX'
private static final int THRESHOLD = 10; 1iL xXd
}F6b ]
/* XF$]KAL0
* (non-Javadoc) Tk&9Klo
* C&N4<2b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s,H(m8#>
*/ C)p<M H<
public void sort(int[] data) { \3?;[xD
int[] temp=new int[data.length]; B RjKV
mergeSort(data,temp,0,data.length-1); ArzsZ<\//
} d ovwB`5
~j#6 goKn
private void mergeSort(int[] data, int[] temp, int l, int r) { [(EH
int i, j, k; %MZDm&f>Kk
int mid = (l + r) / 2; *[:CbFE0y
if (l == r) Yka&Kkw
return; kTc5KHJ7
if ((mid - l) >= THRESHOLD) F{~r7y;0
mergeSort(data, temp, l, mid); @]wem
else ULmdt
insertSort(data, l, mid - l + 1); p+UHJ&
if ((r - mid) > THRESHOLD) {<[tYZmj.
mergeSort(data, temp, mid + 1, r); b:cK>fh0_
else ~{Rt4o _W
insertSort(data, mid + 1, r - mid); KVpAV$|e
SLOYlRGCi
for (i = l; i <= mid; i++) { +{i"G,3
temp = data; ef:$1VIBda
} ]G~N+\8]U
for (j = 1; j <= r - mid; j++) { QYw4kD}
temp[r - j + 1] = data[j + mid]; >E ;o"
} /M*\t.[ 46
int a = temp[l]; 8;f<qu|w
int b = temp[r]; PG[O?l
for (i = l, j = r, k = l; k <= r; k++) { {)9HS~e T
if (a < b) { @<TZH
data[k] = temp[i++]; {&u7kWD|
a = temp; 6ri?y=-c
} else { X3L[y\
data[k] = temp[j--]; }6,bq`MN
b = temp[j]; lWw!+[<:q1
} ^I~T$YjC '
} exEld
} (i0"hi
@j2*.ee
/** $o$Ev@mi
* @param data JKi@Kw
* @param l $0S#d@v}
* @param i K(KP3Q
*/ ) wo2GF
private void insertSort(int[] data, int start, int len) { [Ro0eH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /Q>{YsRRB
} 3/IWO4?_
} dzE Q$u/I
} ?$@KwA
} E(3+o\w
&G|jzXE
堆排序： YEPG[W<kg
5OW8G][
package org.rut.util.algorithm.support; Q1I_=fT
*5_8\7d
import org.rut.util.algorithm.SortUtil; y_4krY|Zx
#JR,C -w
/** g6/N\[b%
* @author treeroot vWi.[]
* @since 2006-2-2 Z0 IxYEp
* @version 1.0 8xpYQ<cax
*/ NRuG?^/}d
public class HeapSort implements SortUtil.Sort{ a.&#dxgW[
H^PqYLjN
/* (non-Javadoc) _ kSPUP5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +V+*7s%fL
*/ r~G]2*3
public void sort(int[] data) { eo*u(@
MaxHeap h=new MaxHeap(); &;h~JS=
h.init(data); p1VahjRE-
for(int i=0;i h.remove(); !k= 0X\5L
System.arraycopy(h.queue,1,data,0,data.length); azDC'.3{p
} ^Im%D(MY
uJ/?+5TU
private static class MaxHeap{ 5ih"Nds[H
!ga(L3vf
void init(int[] data){ Z(k\J|&9C
this.queue=new int[data.length+1]; jle%|8m&@
for(int i=0;i queue[++size]=data; ci_v7Jnwo
fixUp(size); #u<oEDQ
} 51ajE2+X&
} U_}A{bFG
sAD P~xvU
private int size=0; Y9@dZw%2
Ij6Wz.*
private int[] queue; _]D#)-uv}C
Y zBA{FE
public int get() { /@:up+$
return queue[1]; nc\C4g
} kF+}.x%
>xZhK63C/
public void remove() { VM]GYz|#]
SortUtil.swap(queue,1,size--); APtselC
fixDown(1); 7tfivIj)e
} ueE?"Hk
file://fixdown 4/`h@]8P
private void fixDown(int k) { [6_Du6\h
int j; -Nlf~X
while ((j = k << 1) <= size) { Dd5xXs+c
if (j < size %26amp;%26amp; queue[j] j++; }rY?=I
if (queue[k]>queue[j]) file://不用交换 }$0xt'q&
break; %7(kP}y*
SortUtil.swap(queue,j,k); >NH4A_
k = j; >: W-C{%
} 4QjWZ Wl
} [C+Gmu
private void fixUp(int k) { HL(U~Q6JQ
while (k > 1) { r}y[r}vk
int j = k >> 1; V@f6Lj
if (queue[j]>queue[k]) ^0`<k
break; "Ql}Y1
SortUtil.swap(queue,j,k); :<N6i/
k = j; RhV:Z3f`6
} &G pA1
} jr[<i\!
M)`HK .
} U7]<U-.&
}dd k}wga
} sk7rU+<
W<rTq0~$?
SortUtil： FM9X}%5nu9
;Y@!:p-H
package org.rut.util.algorithm; >St.&#c
f E.L
import org.rut.util.algorithm.support.BubbleSort; s,$Z("B
import org.rut.util.algorithm.support.HeapSort; WG8iTVwx
import org.rut.util.algorithm.support.ImprovedMergeSort; mZbWRqP[|_
import org.rut.util.algorithm.support.ImprovedQuickSort; cZDxsd]
import org.rut.util.algorithm.support.InsertSort; dcl.wD0~V
import org.rut.util.algorithm.support.MergeSort; e'~-`Z9-)
import org.rut.util.algorithm.support.QuickSort; wUK7um
import org.rut.util.algorithm.support.SelectionSort; %Le:wC
import org.rut.util.algorithm.support.ShellSort; UK"}}nO@e
':!3jZP"m
/** yV J dZI
* @author treeroot G%7 4v|cd
* @since 2006-2-2 S(>@:`=
* @version 1.0 n%0]V Xx#
*/ 2/v35| ?
public class SortUtil { 6Iv(
public final static int INSERT = 1; 2ec$xms
public final static int BUBBLE = 2; t_I\P.aMA
public final static int SELECTION = 3; 1jH7<%y
public final static int SHELL = 4; 6WE&((r^
public final static int QUICK = 5; @%EE0)IA
public final static int IMPROVED_QUICK = 6; XOysgX0g
public final static int MERGE = 7; gf68iR.Gs
public final static int IMPROVED_MERGE = 8; WCuzV7tw
public final static int HEAP = 9; E\]OySC%C$
AezvBY0'`z
public static void sort(int[] data) { ~|CJsD/
sort(data, IMPROVED_QUICK); F-BJe]
} N+CXOI=6x
private static String[] name={ NI5]Nz<?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >H0) ph
}; }O,U2=Hw`]
xl+DRPzl
private static Sort[] impl=new Sort[]{ *M> iZO*@
new InsertSort(), JcTp(fnW.~
new BubbleSort(), vix&E`0yD
new SelectionSort(), 0PnD|]9:
new ShellSort(), 2qZa9^}
new QuickSort(), 3[0w+{(Q
new ImprovedQuickSort(), Yz&*PPx
new MergeSort(), SXRdNPXFO
new ImprovedMergeSort(), <91t`&aWW
new HeapSort() *2JH_Cj`
}; ="uKWt6n'
I?_E,.)[ I
public static String toString(int algorithm){ eecw]P_?
return name[algorithm-1]; CY*ngi&
} EKZ$Q4YE
s<A*[
public static void sort(int[] data, int algorithm) { Q~fwWp-J
impl[algorithm-1].sort(data); hq/J6 M
} *0%4l_i
)n\*ht7
public static interface Sort { SU?wFCGT%
public void sort(int[] data); i(Ip(n
} JN9^fR09G
XzlKP;r0
public static void swap(int[] data, int i, int j) { r1i$D
int temp = data; `IEq@Wr#$!
data = data[j]; v"z(JF
data[j] = temp; B0f_kH~p~
} "'['(e+7
} =2^Vgc