[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; ?<3wks|C
} )?L
int i1=l; H Pvs~`>V
int i2=mid+1; ;gE]*Y.Z.p
for(int cur=l;cur<=r;cur++){ ak_&\'P
if(i1==mid+1) S.^/Cl;aj
data[cur]=temp[i2++]; El9D1],
else if(i2>r) ' ];|
data[cur]=temp[i1++]; 5Vq&w`sW
else if(temp[i1] data[cur]=temp[i1++]; vz{Z tE"
else m :M=De
data[cur]=temp[i2++]; -OvzEmI"
} w-2?|XvDmf
} ^p@ #
8ux?K5_
} d :(&q
x'OYJ>l|
改进后的归并排序: I=vGS
o8Q+hZB}A
package org.rut.util.algorithm.support; Zndv!z
g`NJ `
import org.rut.util.algorithm.SortUtil; Ms * `w5n
c5vi Y|C^
/** 2|n)ZP2cp
* @author treeroot *=b#>//
* @since 2006-2-2 oM<Y o%n
* @version 1.0 )p?p39>h
*/ &_1Ivaen6
public class ImprovedMergeSort implements SortUtil.Sort { e#R'_}\yj
]ULE>a
private static final int THRESHOLD = 10; N,oN3mFF
O4l]Q
/* G]NnGL<xk
* (non-Javadoc) sTmY'5ry
* /E%r@Rui3$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uu}a! V
*/ N\f={O8E
public void sort(int[] data) { :4HZ>!i
int[] temp=new int[data.length]; KMU2PoqD
mergeSort(data,temp,0,data.length-1); xoT|fgb
} |mHxkd
S(&]?!
private void mergeSort(int[] data, int[] temp, int l, int r) { il403Ae0
int i, j, k; IN{ 1itE
int mid = (l + r) / 2; -JMlk:~
if (l == r) *F_ dP
return; nKR=/5a4Y
if ((mid - l) >= THRESHOLD) krt8yAkG
mergeSort(data, temp, l, mid); =W*Js%4
else }\-"L/D?+
insertSort(data, l, mid - l + 1); w%Bo7 'o)V
if ((r - mid) > THRESHOLD) 8dBG ZwyET
mergeSort(data, temp, mid + 1, r); +f+#W
else 7UVhyrl
insertSort(data, mid + 1, r - mid); #<4/ *< 5
GM{J3O=
for (i = l; i <= mid; i++) { FxK2 1
temp = data; q.GA\o
} #0F6{&; M
for (j = 1; j <= r - mid; j++) { o(q][:,h
temp[r - j + 1] = data[j + mid]; li`4&<WGC
} 3Mlwq'pzD
int a = temp[l]; vwc)d{ND
int b = temp[r]; 7y/Pch
for (i = l, j = r, k = l; k <= r; k++) { o5;V=8T;
if (a < b) { [0lu&ak[&
data[k] = temp[i++]; @/DHfs4O
a = temp; Q+r8qnL'
} else { p3f>;|uh_
data[k] = temp[j--]; d^.@~
b = temp[j]; kN'.e*
} KcW]"K>p!
} r6x"D3
} Z'@a@Y+
l7p*::(9
/** !(&N{NH9
* @param data }}cS-p
* @param l i^O(JC
* @param i v})-:
*/ aYC[15?'
private void insertSort(int[] data, int start, int len) { wv6rjg:7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CSBk
} )]W|i9
} VvS ^f
} .&Q'aOg
} L FncY(b
q|r/%[[!o
堆排序： \i}:Vb(^
+hW^wqk/.
package org.rut.util.algorithm.support; j/h>G,>T=
z4UJo!{S
import org.rut.util.algorithm.SortUtil; 'u)zQAaw.
kpQXnDm2
/** /HiRbwQK#
* @author treeroot 9pPohR*#V
* @since 2006-2-2 ,[j'OyR
* @version 1.0 ;`(l)X+7
*/ 'T_Vm%\)
public class HeapSort implements SortUtil.Sort{ *fIb|r
*It`<F|
/* (non-Javadoc) R{X@@t9@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u*:;O\6l
*/ L6jD4ec8
public void sort(int[] data) { n$})}kj
MaxHeap h=new MaxHeap(); tu%!j}3s
h.init(data); $ M8ZF(W
for(int i=0;i h.remove(); /^XGIQ/W
System.arraycopy(h.queue,1,data,0,data.length); W :qQ
} 1(;_1@P
Ck;>9>
private static class MaxHeap{ O:hCUr
=;!$Qw4
void init(int[] data){ B7R*g,(
this.queue=new int[data.length+1]; T*'?;u
for(int i=0;i queue[++size]=data; %~$P.Zh
fixUp(size); w:0=L`<Eu
} jIOrB}
} $!Pm*s
Z}E.s@w
private int size=0; i`F8kg`_K
#$ Q2ijT0
private int[] queue; ='p&T|&
UmC_C[/n?
public int get() { 2VY.#9vl
return queue[1]; m&36$>r=
} s>VpbJ3S
oU`J~6.&S
public void remove() { l^ Q-KUI
SortUtil.swap(queue,1,size--); o(w xu)
fixDown(1); /Mg$t6vM
} h\@\*Xz<v
file://fixdown /%P|<[< [
private void fixDown(int k) { x_yQoae
int j; %( tu<
while ((j = k << 1) <= size) { 2L!wbeTb;
if (j < size %26amp;%26amp; queue[j] j++; SMMsXH
if (queue[k]>queue[j]) file://不用交换 UUuB Rtau
break; w}`TJijl
SortUtil.swap(queue,j,k); aJmSagr69C
k = j; >;9+4C<z0
} YVpsf8R
} !qF U
private void fixUp(int k) { ]3%( '8/
while (k > 1) { `wzb}"gLsM
int j = k >> 1; "%~Jb dx
if (queue[j]>queue[k]) Y<"BhE
break; ;B,6v P#
SortUtil.swap(queue,j,k); n*Q~<`T
k = j; Q=+*OQV29
} l[G&=/R@H
} .h0@Vs
zlw+=NX
} 3b#eB
-!~T$}/F
} I>(3\z4s
^)|!nd
SortUtil： ]V4Fm{]
p;P"mp\'
package org.rut.util.algorithm; ,'KS:`m!
AD** 4E
import org.rut.util.algorithm.support.BubbleSort; [nx OGa2
import org.rut.util.algorithm.support.HeapSort; Xv~v=.HNhk
import org.rut.util.algorithm.support.ImprovedMergeSort; L7}dvdtZ0
import org.rut.util.algorithm.support.ImprovedQuickSort; d5hYOhO[
import org.rut.util.algorithm.support.InsertSort; &m8#^]*
import org.rut.util.algorithm.support.MergeSort; Tgf#I*(^]
import org.rut.util.algorithm.support.QuickSort; dkr[B'n
import org.rut.util.algorithm.support.SelectionSort; FM80F_G^z
import org.rut.util.algorithm.support.ShellSort; )$.::[pNA
.d4L@{V
/** 9;L5#/E
* @author treeroot fs:%L
* @since 2006-2-2 - s}
* @version 1.0 ,/XeG`vk
*/ jIzkI)WC|
public class SortUtil { K]
public final static int INSERT = 1; mw[T[
public final static int BUBBLE = 2; HVq02 Z
public final static int SELECTION = 3; 6G^x%s
public final static int SHELL = 4; Q|gRBu
public final static int QUICK = 5; O>h,u[0
public final static int IMPROVED_QUICK = 6; 3[RP:W@%
public final static int MERGE = 7; T@S\:P
public final static int IMPROVED_MERGE = 8; b!h*I>`
public final static int HEAP = 9; 9ozK}Cg4
4=Wtv/ 3
public static void sort(int[] data) { ]WO0v`xh
sort(data, IMPROVED_QUICK); 08+cNT
} S-4C>gM
private static String[] name={ s.zfiJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nz?jNdyz
}; 8n[6BF);
'pa>;{
private static Sort[] impl=new Sort[]{ W`qiPLk
new InsertSort(), 8BHtN
new BubbleSort(), Tx+Bkfj
new SelectionSort(), h8ikM&fl
new ShellSort(), vq.~8c1
new QuickSort(), P_[A
new ImprovedQuickSort(), T[z}^"
new MergeSort(), "L(4 EcO@
new ImprovedMergeSort(), /F(wb_!
new HeapSort() JFJ_ PphvD
}; z`?{5v -Qs
n)n>|w_
public static String toString(int algorithm){ ~"Kf+eFi
return name[algorithm-1]; #lf3$Tm D
} w6PKr^
J#```cB
public static void sort(int[] data, int algorithm) { G<5i %@
impl[algorithm-1].sort(data); \L-K}U>J
} &V$qIvN$
o/;kzi
public static interface Sort { w`N|e0G@
public void sort(int[] data); BotGPk><c
} ~=!d>f~U
"M GX(SQ
public static void swap(int[] data, int i, int j) { 2i~tzo
int temp = data; =)2sehU/
data = data[j]; \e=Iw"yd
data[j] = temp; tiTJ.uz6
} zm&D#)
} "<#-#j