[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; ~D5 -G?%$"
} /IirTmFK
int i1=l; i}T*| P
int i2=mid+1; Md6u4c
for(int cur=l;cur<=r;cur++){ >Iij,J5i
if(i1==mid+1) {A}T^q!m]
data[cur]=temp[i2++]; J.~@j;[2
else if(i2>r) i?_Q@uA~<:
data[cur]=temp[i1++]; S%RxYJ(
else if(temp[i1] data[cur]=temp[i1++]; mpYBMSLM
else uNf'Zeo
data[cur]=temp[i2++]; Yte*$cJ=
} R655@|RT
} &Hw:65O
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} -t_&H\_T
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改进后的归并排序: _3 !s{
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package org.rut.util.algorithm.support; ,vR>hyM
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import org.rut.util.algorithm.SortUtil; 0Cc3NNdz
%YxKWZ/?
/** bP:u`!p -i
* @author treeroot e,XT(KY
* @since 2006-2-2 ~&/Nl_#
* @version 1.0 (fc_V[(m"
*/ ,>6mc=p
public class ImprovedMergeSort implements SortUtil.Sort { o5],c9R9b
a[t"J*0
private static final int THRESHOLD = 10; _WV13pnRu
Tu:lIy~A
/* ^cdbM
* (non-Javadoc) ; <- f
* )~)T[S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JNU9RxR
*/ =>*}qen
public void sort(int[] data) { <a CzB7x
int[] temp=new int[data.length]; r 8N<<^
mergeSort(data,temp,0,data.length-1); 8U#14U5rS
} M!G/5:VZ
^g'uR@uU
private void mergeSort(int[] data, int[] temp, int l, int r) { TGpdl`k\T
int i, j, k; %PVu>^
int mid = (l + r) / 2; \hJLa
if (l == r) USE!
return; Ow0~sFz
if ((mid - l) >= THRESHOLD) .ErR-p=-
mergeSort(data, temp, l, mid); ~LH).\V
else 3&X5*-U
insertSort(data, l, mid - l + 1); \KEmfCx'n
if ((r - mid) > THRESHOLD) ziAn9/sT
mergeSort(data, temp, mid + 1, r); 7vqE@;:dt
else d.snD)X
insertSort(data, mid + 1, r - mid); %z1hXh#+
Vg7+G( ,
for (i = l; i <= mid; i++) { LNgFk%EH
temp = data; ZB}zT9JaE
} Lz-(1~o
for (j = 1; j <= r - mid; j++) { ohPXwp?]
temp[r - j + 1] = data[j + mid]; ,=6;dT
} 6%VRQ#g!
int a = temp[l]; %e: hVU
int b = temp[r]; _T^@,!&
for (i = l, j = r, k = l; k <= r; k++) { r^d:Po
if (a < b) { q_6<}2m,U
data[k] = temp[i++]; btf]~YN
a = temp; :JxuaM8
} else { g*U[?I"sC
data[k] = temp[j--]; EU7mP MxJ
b = temp[j]; {Cw>T-`
} 6r5<uZ9w_X
} ^@maF<Jb
} JOq&(AZe
Daf;; w
/** d_Y7/_i
* @param data ;#2yF34gv
* @param l 3}?]G8iL?L
* @param i ID=^497
*/ _K>YB>W}7
private void insertSort(int[] data, int start, int len) { pu+jw<7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JLxAk14lc
} P_c9v/
} dBp)6ok#c
} OEgp!J
} >]8H@. \
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堆排序： 3hzKd_
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package org.rut.util.algorithm.support; RC]-9gd3Q
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import org.rut.util.algorithm.SortUtil; QK/~lN
r`CsR0[
/** g)~"-uQQ
* @author treeroot dX~$#-Ad86
* @since 2006-2-2 |`6*~ciUV
* @version 1.0 w97%5[-T
*/ Sy`7})[
public class HeapSort implements SortUtil.Sort{ ?r-W , n
Bgj^n{9x
/* (non-Javadoc) &,~Oi(SX5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jAb R[QR1%
*/ UB1/0o
public void sort(int[] data) { =?gB@vS
MaxHeap h=new MaxHeap(); 5QUL-*t
h.init(data); ify}xv
for(int i=0;i h.remove(); J PK(S~
System.arraycopy(h.queue,1,data,0,data.length); g O ;oM?|
} <mdHca
[kyIF\0
private static class MaxHeap{ jLG Q^v"
E;AOCbV*$
void init(int[] data){ &;Jg2f%.
this.queue=new int[data.length+1]; m<uBRI*I
for(int i=0;i queue[++size]=data; 3=~0m
fixUp(size); +GqUI~a
} &`IC3O5
} wz=c#}0dB
||t"}Y
private int size=0; #?EmC]N7
.8EaFEd
private int[] queue; z->[:)c
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public int get() { OkaNVTB
return queue[1]; w[X/|O
} I c 2R\}q
J-wF2*0r<
public void remove() { 7dbGUbT
SortUtil.swap(queue,1,size--); ^\ocH|D
fixDown(1); )eaEc9o>
} Ri mz~}+
file://fixdown --chU5
private void fixDown(int k) { \hr2#!
int j; H%z9VJ*!0
while ((j = k << 1) <= size) { M4`.[P4
if (j < size %26amp;%26amp; queue[j] j++; }5qpiS"V9
if (queue[k]>queue[j]) file://不用交换 gONybz6]
break; >j$y@"+
SortUtil.swap(queue,j,k); vQ",rP%
k = j; A4>j4\A[M
} J70r`
} V>Vu)7
private void fixUp(int k) { %ot4$eY
while (k > 1) { U1^3 &N8
int j = k >> 1; #Li6RSeW
if (queue[j]>queue[k]) !xxdC
break; @zGz8IF
SortUtil.swap(queue,j,k); {GP#/5$=
k = j; =dM'n}@U
} ziTE*rNJ
} Xdtyer%
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} SWWeN#Q
+Cg[!6[#
} Rw!wfh_+
P4{!/&/
SortUtil： O@-|_N*;K
dp DPSI
package org.rut.util.algorithm; >o,l/#z
5BRZpCb
import org.rut.util.algorithm.support.BubbleSort; 15\k/[3 #
import org.rut.util.algorithm.support.HeapSort; *1c1XN<7
import org.rut.util.algorithm.support.ImprovedMergeSort; ;@$v_i
import org.rut.util.algorithm.support.ImprovedQuickSort; 6TkV+\
import org.rut.util.algorithm.support.InsertSort; ]b'"l
import org.rut.util.algorithm.support.MergeSort; 9L7jYy=A#
import org.rut.util.algorithm.support.QuickSort; $;VY`n
import org.rut.util.algorithm.support.SelectionSort; $3)Z>p
import org.rut.util.algorithm.support.ShellSort; PDNbhUAV
mGP&NOR0^y
/** }>$3B5}
* @author treeroot NSkIzaNY
* @since 2006-2-2 %ki^XB86
* @version 1.0 Bm4fdf#A]
*/ ![Ll$Lr
public class SortUtil { !>,XK!)
public final static int INSERT = 1; '9XSz?
public final static int BUBBLE = 2; JS2h/Y$
public final static int SELECTION = 3; n}L Jt
public final static int SHELL = 4; mZ0'-ax
public final static int QUICK = 5; BBDt^$
public final static int IMPROVED_QUICK = 6; <:ptNGR
public final static int MERGE = 7; #fT<]j(
public final static int IMPROVED_MERGE = 8; }!*CyO*
public final static int HEAP = 9; x.kIzI5
\w@V7~vA
public static void sort(int[] data) { J7FzOwd1h
sort(data, IMPROVED_QUICK); IrMxdF~c
} n@_aTY
private static String[] name={ [5i}C K_=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y>Ju$i
}; EK2mJCC|
d:3OC&
private static Sort[] impl=new Sort[]{ H7CWAQPfj
new InsertSort(), SL5QhP
new BubbleSort(), yt[*4gF4
new SelectionSort(), ^?R8>97_?
new ShellSort(), Gc,6;!+(
new QuickSort(), pKkBAr,
new ImprovedQuickSort(), *IQQsfL)
new MergeSort(), .1YiNmW=
new ImprovedMergeSort(), i{biQ|,.sL
new HeapSort() 0P l>k'9
}; TxP8&!d
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public static String toString(int algorithm){ p(fL' J
return name[algorithm-1]; |32uC3?o
} ('1]f?:M
CfEACH4_
public static void sort(int[] data, int algorithm) { H:]'r5sw
impl[algorithm-1].sort(data); ,w%hD*
} N7UGgn=
0S#T}ITm4Z
public static interface Sort { |Ng}ZLBM
public void sort(int[] data); bBY7^k
} ]o($No
#tN!^LLi
public static void swap(int[] data, int i, int j) { j^m x,
int temp = data; n+D93d9LP
data = data[j]; X86r`}
data[j] = temp; p-kug]qX
} -Ra-Ux
} D_M73s!U