[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; 2%>FR4a
} />Nt[o[r
int i1=l; ,47qw0=C
int i2=mid+1; q =Il|Nb>
for(int cur=l;cur<=r;cur++){ 4=.so~9odX
if(i1==mid+1) b2]Kx&!
data[cur]=temp[i2++]; >MK98(F
else if(i2>r) uocGbi:V';
data[cur]=temp[i1++]; W`&hp6Jq
else if(temp[i1] data[cur]=temp[i1++]; .KC++\{HE
else x:7IIvP
data[cur]=temp[i2++]; <1pEwI~
} Ha ]YJ}
} 0Qd:`HF[
7?t6UPf
} ?q&T$8zc4
SB7c.H,
改进后的归并排序: y?0nI<}}HK
<1%$Vq
package org.rut.util.algorithm.support; tu?MYp;
MPk5^ua:
import org.rut.util.algorithm.SortUtil; 8V(pugJ
PVOv[%
/** Vg23!E
* @author treeroot njw|JnDv
* @since 2006-2-2 Tf)*4O4@'
* @version 1.0 fAmz4
*/ y==CTY@
public class ImprovedMergeSort implements SortUtil.Sort { $SE^S
1.X@;
private static final int THRESHOLD = 10; pNIf=lA
i LAscb
/* TPY}C
* (non-Javadoc) rbpSg7}Q
* g1o8._f.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3,=6@U
*/ $g7<Y*t[
public void sort(int[] data) { \L\b$4$d
int[] temp=new int[data.length]; m6djeOl
mergeSort(data,temp,0,data.length-1); eY\yE"3
} -(#iIgmP
EZj9wd"u
private void mergeSort(int[] data, int[] temp, int l, int r) { 9K&:V(gmw
int i, j, k; AK#1]i~
int mid = (l + r) / 2; U?=Dg1
if (l == r) 63A.@mL
return; Gbw2E&a
if ((mid - l) >= THRESHOLD) V_:&S2j
mergeSort(data, temp, l, mid); 'ah[(F<*@e
else ;'Nd~:-]
insertSort(data, l, mid - l + 1); &w~d_</
if ((r - mid) > THRESHOLD) ,=:D
mergeSort(data, temp, mid + 1, r); ,1##p77.
else !YJs]_Wr
insertSort(data, mid + 1, r - mid); e!r-+.i(
lPJ\-/>$z
for (i = l; i <= mid; i++) { AFfAtu
temp = data; PzR[KUK
} o+9j?|M
for (j = 1; j <= r - mid; j++) { 'Qo*y%{@5
temp[r - j + 1] = data[j + mid]; -Vhw^T1iV
} ^Q^_?~h*!
int a = temp[l]; \B 7tX
int b = temp[r]; jZ3fKyp#
for (i = l, j = r, k = l; k <= r; k++) { 6Kb1~jY
if (a < b) { tdaL/rRe
data[k] = temp[i++]; $lut[o74
a = temp; $DUZ!zaH!
} else { 4YX3+oS
data[k] = temp[j--]; 7`hP?a=
b = temp[j]; =6#Eh=7N
} IyPnp&_
} 2,P^n4~A?w
} L z1ME(
I,'k>@w{s
/** Q?/o%`N
* @param data UEVG0qF
* @param l 63~ E#Dt4
* @param i 9?3&?i2-
*/ <V6VMYXY4
private void insertSort(int[] data, int start, int len) { wsVV$I[2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @{pLk4E
} :$9tF>
} 2Q"K8=s
} E\2%E@0#
} PIpi1v*qz
wuJ4kW$
堆排序： ;{o|9x|
q8Z<{#oXu
package org.rut.util.algorithm.support; r{%qf;
M+9gL3W
import org.rut.util.algorithm.SortUtil; oFGhNk
&q|K!5[k
/** LAe6`foW/
* @author treeroot =+?7''{>
* @since 2006-2-2 5j-YM
* @version 1.0 ^Zy%fv,
*/ yN s,Ll~
public class HeapSort implements SortUtil.Sort{ _M5|Y@XN-
Yr=Y@~ XL
/* (non-Javadoc) r s?R:+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sw^u3
*/ Eue~Y+K*b
public void sort(int[] data) { 2oRg 2R}
MaxHeap h=new MaxHeap(); Y~E`9
h.init(data); f_Av3
for(int i=0;i h.remove(); ;H.^i|_/
System.arraycopy(h.queue,1,data,0,data.length); JNUt$h
} u21EP[[,
P&e\)Z|
private static class MaxHeap{ 8rS:5:Hi
>:!X.TG$
void init(int[] data){ pWsDzb6?%
this.queue=new int[data.length+1]; #!KE\OI;@5
for(int i=0;i queue[++size]=data; 1.9}_4!
fixUp(size); O,h;hQZ
} <r`2)[7N
} VsE9H]v
wInh~p
private int size=0; p\ZNy\N^
s;vHPUB\n
private int[] queue; vf%&4\ib
,.1Psz^U
public int get() { Y@ksQ_u
return queue[1]; qd)/9*|Jl
} krvp&+uX
I\[_9
public void remove() { Z%/=|[9i
SortUtil.swap(queue,1,size--); }YNR"X9*)/
fixDown(1); NI [ pp`
} hPePB=
file://fixdown 364`IC( a
private void fixDown(int k) { 9g"2^^wD
int j; T7u%^xm
while ((j = k << 1) <= size) { )MchsuF<
if (j < size %26amp;%26amp; queue[j] j++; }n2M G
if (queue[k]>queue[j]) file://不用交换 `Kr,>sEAM
break; ;^%4Q"
SortUtil.swap(queue,j,k); QKN+>X
k = j; &3Szje
} nd1+"-,q
} cH?B[S;]
private void fixUp(int k) { 5ZK@`jkE
while (k > 1) { Ix=}+K/
int j = k >> 1; Vq?p|wy
if (queue[j]>queue[k]) ,+xB$e
break; c>RFdc:U
SortUtil.swap(queue,j,k); F!Q@u
k = j; jQ
} &Ao+X=qw
} ?ztkE62t
dCk3;XU
} n}G|/v<
FZ,#0ZYJGP
} 6ne7]RY
X_|J@5b7
SortUtil： +M$Q =6/
k!HK 97qA
package org.rut.util.algorithm; %<*g!y `
0ANZAX5
import org.rut.util.algorithm.support.BubbleSort; kZZh"#W: L
import org.rut.util.algorithm.support.HeapSort; 72y0/FJ
import org.rut.util.algorithm.support.ImprovedMergeSort; z>Hgkp8D"
import org.rut.util.algorithm.support.ImprovedQuickSort; $gy*D7
import org.rut.util.algorithm.support.InsertSort; X4E%2-m@'
import org.rut.util.algorithm.support.MergeSort; a8iQ4
import org.rut.util.algorithm.support.QuickSort; =&2Lb
import org.rut.util.algorithm.support.SelectionSort; h=kh@},
import org.rut.util.algorithm.support.ShellSort; `A^"%@j
C:C}5<fkx
/** DB:+E|vSD
* @author treeroot /.MN
* @since 2006-2-2 ;1.,Sn+zO
* @version 1.0 _Khc3Jo
*/ Z99>5\k
public class SortUtil { D.Q=]jOs
public final static int INSERT = 1; M#VE]J
public final static int BUBBLE = 2; /ZPyN<@
public final static int SELECTION = 3; `~Zs0
public final static int SHELL = 4; bMMh|F
public final static int QUICK = 5; EzV96+
public final static int IMPROVED_QUICK = 6; DV-;4AxxRq
public final static int MERGE = 7; 0#&5.Gr)
public final static int IMPROVED_MERGE = 8; B$!)YD;
public final static int HEAP = 9; V'T ,4
7=WT69,&
public static void sort(int[] data) { (>GK\=:<
sort(data, IMPROVED_QUICK); `[)YEgs
} %i-c0|,T4
private static String[] name={ _m'Fr 7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r{ef.^&:
}; ReI/]#Us
Hp|_6hO 2
private static Sort[] impl=new Sort[]{ 4 G-wd
new InsertSort(), "a"]o
new BubbleSort(), qI<mjB{3`
new SelectionSort(), #=f?0UTA
new ShellSort(), >wBJy4:
new QuickSort(), V=V:SlS9|
new ImprovedQuickSort(), M&Uj^K1
new MergeSort(), 3]UUG
new ImprovedMergeSort(), RUT,Y4 b
new HeapSort() FPI;Jx6W'
}; ^[XYFQTL
.wu xoq
public static String toString(int algorithm){ w1#gOwA,$
return name[algorithm-1]; ?zVL;gVWA
} f[~L?B;_L
;)e2@'Agl
public static void sort(int[] data, int algorithm) { D-(w_$#
impl[algorithm-1].sort(data); 3G~@H>j
} Z1Z1@2 T
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public static interface Sort { >W`4aA
public void sort(int[] data); oifv+oY
} B'EKM)dA
7`8Ik`lY
public static void swap(int[] data, int i, int j) { ;Tc`}2
int temp = data; xs:n\N
data = data[j]; <**y !2
data[j] = temp; ~UjGSO)z}
} ``e$AS
} *nsAgGKKM^