[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; R{Zd ]HT
} s I\-0og
int i1=l; <%d!Sk4
int i2=mid+1; ?M|1'`!c8
for(int cur=l;cur<=r;cur++){ {irc~||4
if(i1==mid+1) &b^~0Z
data[cur]=temp[i2++]; gjz-CY.hz
else if(i2>r) _()1"5{
data[cur]=temp[i1++]; g-UCvY I
else if(temp[i1] data[cur]=temp[i1++]; ?ZGsh7<k
else U$OI]Dd9
data[cur]=temp[i2++]; 7FY2a
} K^@9\cl^
} +C~d;p
(p12=EB<
} G{4s~Pco[Q
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改进后的归并排序: FP=27=
+'5I8FE-
package org.rut.util.algorithm.support; rOE: ap|KL
*k8?$(
import org.rut.util.algorithm.SortUtil; AIn/v`JeX
&wY$G! P
/** w< Xwz`O
* @author treeroot =&pLlG
* @since 2006-2-2 6hd<ys?
* @version 1.0 3+uL@LXd
*/ GrJLQO0$N
public class ImprovedMergeSort implements SortUtil.Sort { &V~l(1
=$)M-;6
private static final int THRESHOLD = 10; \$.{*f
IaSpF<&Y;
/* 2'-"&d+O
* (non-Javadoc) d,l?{Ln
* ojlyW})$%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *-5N0K<kQ
*/ Q0K$ZWM`7
public void sort(int[] data) { .?QYqGcG
int[] temp=new int[data.length]; N2'aC} I
mergeSort(data,temp,0,data.length-1); %>=6v}f,+
} P[G>uA>Z1
_9 '_w&
private void mergeSort(int[] data, int[] temp, int l, int r) { v ;}s`P\"
int i, j, k; EZ|v,1`e
int mid = (l + r) / 2; 4LB8p7$|a3
if (l == r) E}S%yD[
return; n6WKk+
if ((mid - l) >= THRESHOLD) &R@([=1
mergeSort(data, temp, l, mid); (oX!D(OI
else =(7nl#o
insertSort(data, l, mid - l + 1); njX$?V
if ((r - mid) > THRESHOLD) r)}U 'iv*%
mergeSort(data, temp, mid + 1, r); +ppA..1
else bz#]>RD
insertSort(data, mid + 1, r - mid); jci,]*X4
7g"u)L&32
for (i = l; i <= mid; i++) { ^O+(eA7E
temp = data; [F-GaaM
} ;TWLo_
for (j = 1; j <= r - mid; j++) { 3rKJ<(-2/
temp[r - j + 1] = data[j + mid]; ]'(D*4
} n:`f.jG |
int a = temp[l]; [C0v-
int b = temp[r]; 9ZJ 8QH
for (i = l, j = r, k = l; k <= r; k++) { <OGG(dI
if (a < b) { If,p!L
data[k] = temp[i++]; Q7XOO3<):
a = temp; wTa u.Bo
} else { ]n|Jc_Y
data[k] = temp[j--]; w90YlWS#
b = temp[j]; J>}J~[ap\J
} \/Mx|7<
} ,oA<xP-*
} esnq/
6ABK)m-y
/** :+PE1=v
* @param data W~ET/h
* @param l (n*:LS=0
* @param i p8!T) ?|
*/ A'KH_])
private void insertSort(int[] data, int start, int len) { \|S!g_30m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _/I">/ivlM
} P$z_A8}
} 1Q>nS[
} |sReHt2)d
} ;cI*"-I:F
Y!CUUWM
堆排序： DHWz,M
/!?LBtqy
package org.rut.util.algorithm.support; ZKrLp8l\
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import org.rut.util.algorithm.SortUtil; a9.yuSzL
%A$&9c%
/** )?$[iu7 s
* @author treeroot Q# B0JT1
* @since 2006-2-2 $QC1l@[sM
* @version 1.0 ;Y^'$I2fR#
*/ Zj_2>A
public class HeapSort implements SortUtil.Sort{ O1z]d3x
'f-r 6'_ZX
/* (non-Javadoc) FzJ7 OE|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $0 olqt:
*/ 4D0jt$==
public void sort(int[] data) { :dSda,!z
MaxHeap h=new MaxHeap(); ! ;t\lgMl
h.init(data); 2]5{Xmmo9
for(int i=0;i h.remove(); 8D*nU3O
System.arraycopy(h.queue,1,data,0,data.length); EsMX#1>/m
} -BSdrP|
Oo|PZ_P
private static class MaxHeap{ Ur(R[*2bx
r0XEB,}
void init(int[] data){ 2jFuF71
this.queue=new int[data.length+1]; u S1O-Q>
for(int i=0;i queue[++size]=data; }xk(aM_
fixUp(size); kyJbV[o<#
} "Wwu Ty|
} p%3z*2,(
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private int size=0; !@=S,Vc.
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private int[] queue; <(xqw<)
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public int get() { %y6(+I#P
return queue[1]; +i&<`ov
} f"ndLX:'}
|58HPW9
public void remove() { !ZYPz}&N_
SortUtil.swap(queue,1,size--); `x[Is$
fixDown(1); 6O7s^d&K
} y7,I10:D
file://fixdown =SfNA F
private void fixDown(int k) { s<s}6|Z
int j; 8=`L#FkRp
while ((j = k << 1) <= size) { ).SJ*Re*^I
if (j < size %26amp;%26amp; queue[j] j++; k QuEG5n.-
if (queue[k]>queue[j]) file://不用交换 R~\R>\
break; =yf)Z^
SortUtil.swap(queue,j,k); s@F&N9oh
k = j; r)*23&Ojs
} fMUcVTFe
} IfK~~XYG
private void fixUp(int k) { =-h^j
while (k > 1) { Y[{:?i~9,
int j = k >> 1; Ie.*x'b?y
if (queue[j]>queue[k]) AW]\n;f
break; D.K""*ula
SortUtil.swap(queue,j,k); \MP~}t}c
k = j; W[ l
} $DL}jH^S
} 7D6`1&
{&=+lr_h?
} YB38K(
TN(Vzs%
} $UR:j8C{p$
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SortUtil： LR97FG
e4S@ J/D
package org.rut.util.algorithm; SqM>xm
\^!;r9z=A
import org.rut.util.algorithm.support.BubbleSort; xXe3E&
import org.rut.util.algorithm.support.HeapSort; K*/oWYM]
import org.rut.util.algorithm.support.ImprovedMergeSort; D*M `qPX~
import org.rut.util.algorithm.support.ImprovedQuickSort; EoAr}fI
import org.rut.util.algorithm.support.InsertSort; Q{l,4P
import org.rut.util.algorithm.support.MergeSort; bA^uzE
import org.rut.util.algorithm.support.QuickSort; _~<sb,W
import org.rut.util.algorithm.support.SelectionSort; e"E8BU
import org.rut.util.algorithm.support.ShellSort; $.PRav
A)f-r
/** , >LJpv
* @author treeroot +fP.Ewi
* @since 2006-2-2 -?Cr&!*B
* @version 1.0 G:AA>t
*/ 5\Q Tm;
public class SortUtil { p*;!5;OUR
public final static int INSERT = 1; 'nCVjO7o
public final static int BUBBLE = 2; AV5={KK
public final static int SELECTION = 3; i,6OMB $
public final static int SHELL = 4; Ykxk`SJ
public final static int QUICK = 5; 7%*#M#(T
public final static int IMPROVED_QUICK = 6; &jE\D^>ko
public final static int MERGE = 7; nK>CPqB^(
public final static int IMPROVED_MERGE = 8; YX$(Sc3.6
public final static int HEAP = 9; )~ (*q
_@DOH2lXJ
public static void sort(int[] data) { B=|R?t(*
sort(data, IMPROVED_QUICK); ,aP6ct
} ;wn9 21r
private static String[] name={ pY31qhoZ.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dGUP|O
}; 0AQazhm
6G8No-#y
private static Sort[] impl=new Sort[]{ z`{sD]
new InsertSort(), `3;EJDEdbi
new BubbleSort(), l6 G6H$
new SelectionSort(), LA3m,
new ShellSort(), F>fCp
new QuickSort(), w!F>fcm
new ImprovedQuickSort(), s<I)THC
new MergeSort(), AO-5>r
new ImprovedMergeSort(), IMf|/a9-
new HeapSort() 8 v/H;65
}; tFmB`*!%
6,>$Jzs)5E
public static String toString(int algorithm){ K*~{M+lU7
return name[algorithm-1]; 3=O [Q:8
} ;_<~9;
~KK} $iM
public static void sort(int[] data, int algorithm) { sxNf"C=-.
impl[algorithm-1].sort(data); [D"6&
} \Zj%eW!m
f:>y'#P
public static interface Sort { &*`dRIQ]
public void sort(int[] data); GwX)~.i
} C QkY6
V(';2[)
public static void swap(int[] data, int i, int j) { m Q2i$ 0u
int temp = data; <V?2;Gy
data = data[j]; _2fW/U54_
data[j] = temp; ..N6]u
} iLy^U*yK
} s= Fp[>qA