[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; G4ZeO:r
} :m-HHWMN
int i1=l; 6ffrV
int i2=mid+1; 2Xgn[oI{
for(int cur=l;cur<=r;cur++){ 5a-8/.}cP
if(i1==mid+1) t3G%}d?
data[cur]=temp[i2++]; i7*4hYY
else if(i2>r) ^D/*Hp _
data[cur]=temp[i1++]; 5GC{)#4
else if(temp[i1] data[cur]=temp[i1++]; YAd.i@^
else aS:17+!
data[cur]=temp[i2++]; 82>zu}
} ~pwp B2c
} yS lN|8d
8(&C0_yD
} b\H~Ot[i
Zj!S('hSY
改进后的归并排序: &eyFApM[Z
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package org.rut.util.algorithm.support; mtmtOG_/=
=3""D{l
import org.rut.util.algorithm.SortUtil; #^#N%_8
eEupqOF*:W
/** R6CxNPRJ
* @author treeroot JF!!)6!2#
* @since 2006-2-2 8tLkJOu
* @version 1.0 !!dNp5h`
*/ }_XKO\
public class ImprovedMergeSort implements SortUtil.Sort { SyX>zN!
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private static final int THRESHOLD = 10; Ow mI*`
@ttcFX1:W
/* 5-aCNAF2
* (non-Javadoc) >:h 8T]F
* rOH8W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I)9;4lix
*/ "7iHTV
public void sort(int[] data) { e2Ba@e-
int[] temp=new int[data.length]; Z}$.Tm
mergeSort(data,temp,0,data.length-1); T3+hxS
} 7$;mkHu4H%
o^7}H{AE
private void mergeSort(int[] data, int[] temp, int l, int r) { v"=^?5B
int i, j, k; lbTz
int mid = (l + r) / 2; q'd6\G0}
if (l == r) "k5 C?~
return; ?OlYJ/!z3
if ((mid - l) >= THRESHOLD) LYv+Sv
mergeSort(data, temp, l, mid); Pgs4/
else v!K%\h2A
insertSort(data, l, mid - l + 1); \O72PC+
if ((r - mid) > THRESHOLD) }JAg<qy}
mergeSort(data, temp, mid + 1, r); N2xgyKy~
else `{8Sr)
insertSort(data, mid + 1, r - mid); x^9W<
d),@&MSN
for (i = l; i <= mid; i++) { p*n$iroy_{
temp = data; qEX59v
} Y |n_Ro^~
for (j = 1; j <= r - mid; j++) { ]:Ocu--
temp[r - j + 1] = data[j + mid]; +2MsyA?6_
} @U:WWTzf
int a = temp[l]; l*xA5ObV
int b = temp[r]; 5qR76iH)/
for (i = l, j = r, k = l; k <= r; k++) { [t,grdw
if (a < b) { NM
data[k] = temp[i++]; PBR+NHrZ
a = temp; J6rXbui$
} else { @N1ta-D#
data[k] = temp[j--]; BqKD+
b = temp[j]; OA&NWAm4
} * vEG%Y
} 31<hn+pE&
} W>/O9?D
JrYpZ.Nh
/** X*}S(9cg\i
* @param data W^P%k:anK
* @param l "JbFbcj
* @param i _OHz6ag
*/ pjrVPi5&t
private void insertSort(int[] data, int start, int len) { K\,&wU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c|hKo[r)
} LHR%dt|M
} d #y{eV$Q
} >{ne!
} 6aXsRhQ~
@_h/%>0
堆排序： BY32)8SH
6pxj9@X+
package org.rut.util.algorithm.support; /M\S^!g@
xBR2tDi%
import org.rut.util.algorithm.SortUtil; oC>^V5
6n45]?
/** DyYl97+Z?
* @author treeroot /vwGSuk._
* @since 2006-2-2 a:H}c9$%
* @version 1.0 4}LGE>
*/ 33s.p'
public class HeapSort implements SortUtil.Sort{ +.b~2K1
Gk'J'9*
/* (non-Javadoc) D@7\Fg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X];a(7+2
*/ +w%MwPC7`
public void sort(int[] data) { OB;AgE@
MaxHeap h=new MaxHeap(); rM_8piD
h.init(data); f:=q=i
for(int i=0;i h.remove(); 7?Xfge%\
System.arraycopy(h.queue,1,data,0,data.length); "otP^X.
} QR\qGhQ~
oT_k"]~Q~2
private static class MaxHeap{ 0Eo*C9FP~
q71Tg
void init(int[] data){ C4#'`8E
this.queue=new int[data.length+1]; h8$lDFo
for(int i=0;i queue[++size]=data; &AoXv`l4
fixUp(size); ceyZ4M
} zl4Iq+5~6Q
} .y#@~H($
eiJ $}\qJL
private int size=0; KZsSTB6J
%h2U(=/:
private int[] queue; G0xk @SE
`:R8~>p
public int get() { mst-:F[h
return queue[1]; xpRQ"6
} )zz"DH
[;83 IoU}
public void remove() { M,3sK!`>
SortUtil.swap(queue,1,size--); m7cp0+Peo
fixDown(1); [Xg?sdQCI
} u\Tq5PYXt
file://fixdown D)K/zh)
private void fixDown(int k) { '\[GquK;P
int j; `G@]\)-!
while ((j = k << 1) <= size) { WVir[Kv%
if (j < size %26amp;%26amp; queue[j] j++; o~*% g.
if (queue[k]>queue[j]) file://不用交换 mj{TqF
break; Vj2]-]Cm
SortUtil.swap(queue,j,k); !%_}Rv!JT
k = j; bmGIxBRq
} '>@evrG
} wS hsu_(i
private void fixUp(int k) { j_j~BXhIS
while (k > 1) { ri.;&
int j = k >> 1; ApG_Gd.
if (queue[j]>queue[k]) Dc}-wnga
break; q~T*R<S
SortUtil.swap(queue,j,k); J XPE9uH
k = j; BwEO2a{
} ovvR{MTc
} l> W?XH
R]/3`X9!d>
} qa.nm4"6+
+%UfnbZ
} /hQTV!\u
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SortUtil： 5.q2<a :
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package org.rut.util.algorithm; to|O]h2*U2
O>IY<]x>L
import org.rut.util.algorithm.support.BubbleSort; hV)D,oN3
import org.rut.util.algorithm.support.HeapSort; }N&}6U
import org.rut.util.algorithm.support.ImprovedMergeSort; H"=%|/1M0
import org.rut.util.algorithm.support.ImprovedQuickSort; kD8$ir'UYG
import org.rut.util.algorithm.support.InsertSort; [sy~i{Bm
import org.rut.util.algorithm.support.MergeSort; 0L S,(v4
import org.rut.util.algorithm.support.QuickSort; 3-`IMNn!
import org.rut.util.algorithm.support.SelectionSort; ; {iX_%
import org.rut.util.algorithm.support.ShellSort; x&@. [FJhO
zgI!S6q
/** |k\4\aLj
* @author treeroot _)"-zbh}{
* @since 2006-2-2 SDwTGQ/0
* @version 1.0 ^KM' O8
*/ wDVKp['
public class SortUtil { &CpxD."8x
public final static int INSERT = 1; G%jgr"]\z
public final static int BUBBLE = 2; Hbn%CdDk1
public final static int SELECTION = 3; "jb`KBH%"
public final static int SHELL = 4; M%92^;|`
public final static int QUICK = 5; #^|y0:
public final static int IMPROVED_QUICK = 6; NjrF":'Y
public final static int MERGE = 7; EZ:pcnL{
public final static int IMPROVED_MERGE = 8; ? %XTD39
public final static int HEAP = 9; %JF^@\E!|
p.A_,iE
public static void sort(int[] data) { UyTsUkY
sort(data, IMPROVED_QUICK); 6!*be|<&
} w9<<|ZaU
private static String[] name={ U5\^[~vW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DvB!-|ek
}; O2g9<H
;h<(vc3@f
private static Sort[] impl=new Sort[]{ zo6|1xq
new InsertSort(), z$4g9
new BubbleSort(), ,R#pQ 4
new SelectionSort(), 8Wqh 8$
new ShellSort(), ?<)4_
new QuickSort(), ~_8Dv<"a
new ImprovedQuickSort(), #I8)|p?P
new MergeSort(), I$7|?8
new ImprovedMergeSort(), b"Hc==`
new HeapSort() \@&oK2f
}; "\cDSiD
UTB]svC'
public static String toString(int algorithm){ ~"|MwR!0
return name[algorithm-1]; `?E|frz[
} `?f6~$1
+O"!*
public static void sort(int[] data, int algorithm) { -FpZZ8=,M2
impl[algorithm-1].sort(data); -@L7!,j
} =z^2KH
m#1>y}
public static interface Sort { !xk`oW
public void sort(int[] data); .8e]-^Z
} `yF6-F
.j^tFvN~L
public static void swap(int[] data, int i, int j) { iZY4+ X
int temp = data; 9^;Cz>6s
data = data[j]; G5*"P!@6
data[j] = temp; 2^ uP[
} 6Cw+
} /5:2g#S4