[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; *$*V#,V-
} .3:s4=(f
int i1=l; MzpDvnI9
int i2=mid+1; ,cwjieM
for(int cur=l;cur<=r;cur++){ a<Ksas'5S
if(i1==mid+1) 9`|~-b
data[cur]=temp[i2++]; hNUkaP
else if(i2>r) N}X7g0>hV
data[cur]=temp[i1++]; /;V:<mekf
else if(temp[i1] data[cur]=temp[i1++]; dA[S@ysvG
else 9 =zZ,dg
data[cur]=temp[i2++]; Jknit
} ;pVnBi
} 4fgYO]
Cw,;>>Y_b<
} |0s)aV|K
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改进后的归并排序: _eg&j
!UF(R^
package org.rut.util.algorithm.support; rw%1>]os
w)Wg 8
import org.rut.util.algorithm.SortUtil; V4tObZP3Ff
ZO\x|E!b
/** pGT?=/=*
* @author treeroot ~F^7L5d}C
* @since 2006-2-2 p{W'[A{J .
* @version 1.0 #:M <<gk
*/ Y9ipy_@_?
public class ImprovedMergeSort implements SortUtil.Sort { B4{clI_i
2NvbQ 3c5
private static final int THRESHOLD = 10; DQyy">]Mh
GQ])y
/* I6.}r2?;A
* (non-Javadoc) XTS%:S
* #J|DW C!#d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "|6763.{4
*/ !r %u@[(
public void sort(int[] data) { 0o_wy1O1,
int[] temp=new int[data.length]; 7>!Rg~M
mergeSort(data,temp,0,data.length-1); q&d5V~q
} fUa[3)I
?CO..l
private void mergeSort(int[] data, int[] temp, int l, int r) { (^mpb
int i, j, k; Rr"D)|Y;C(
int mid = (l + r) / 2; GPLq$^AH
if (l == r) 0.lOSAq
return; U?&&yynK
if ((mid - l) >= THRESHOLD) I`4k5KB;
mergeSort(data, temp, l, mid); _8ubo\M~
else a1 .+L
insertSort(data, l, mid - l + 1); L6n<h
if ((r - mid) > THRESHOLD) +p):
mergeSort(data, temp, mid + 1, r); t;L7H E@Y
else -I*NS6
insertSort(data, mid + 1, r - mid); a`_w9r+v
.XPPd?R
for (i = l; i <= mid; i++) { o7 1f<&1
temp = data; *Vr;rk
} hYY-Eq4TC
for (j = 1; j <= r - mid; j++) { 7?a!x$-U(
temp[r - j + 1] = data[j + mid]; gSt'<v
} vR?E'K3
int a = temp[l]; 3U&rK)F
int b = temp[r]; (ioJ G-2u
for (i = l, j = r, k = l; k <= r; k++) { w i=&W
if (a < b) { H&h"!+t(#
data[k] = temp[i++]; 5~\GAjf
a = temp; 4">C0m;ks
} else { uG{/yJeU
data[k] = temp[j--]; _a-At
b = temp[j]; ,@r 0-gL
} .qg 2zE$0
} SeIL
} |$&v)
9f_Qs4
/** '/ *;g#W=
* @param data #!R=h|
* @param l \>p\~[cxt
* @param i *!&,)''
*/ @r9[&
private void insertSort(int[] data, int start, int len) { :<i<\TH'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |eEXCn3{
} Ah Rvyj
} [6cf$FS9
} C[Nh>V7=
} bPUldkB:
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堆排序： #[yZP9
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package org.rut.util.algorithm.support; ^Q5advxuq
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import org.rut.util.algorithm.SortUtil; 734<X6^1
#kRt\Fzq
/** vG#,J&aW
* @author treeroot F@rx/3 [
* @since 2006-2-2 E4qQ
* @version 1.0 N%fDgK
*/ RR[1mM
public class HeapSort implements SortUtil.Sort{ zp:EssO=Q
7p[NuU*Gg
/* (non-Javadoc) O2N~&<^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4v;KtD;M
*/ 0^mCj<g
public void sort(int[] data) { KSxZ4Y
MaxHeap h=new MaxHeap(); `=19iAp.
h.init(data); 'l6SL- <
for(int i=0;i h.remove(); Bz4;R9_%I
System.arraycopy(h.queue,1,data,0,data.length); gaU1A"S}
} lnv&fu`1P
Y?xc#'
private static class MaxHeap{ LXf*
"mB /"
void init(int[] data){ y!/:1BHlm
this.queue=new int[data.length+1]; P`OZoI$bV
for(int i=0;i queue[++size]=data; ~en'E
fixUp(size); .F/0:)
} )| 0(#R
} !<= ^&\A
cg_j.=M-
private int size=0; [BuAJ930#5
6@-O#,]J
private int[] queue; iG+=whvL
'Oa(]Br[
public int get() { Hk@LHC
return queue[1]; ~$]Puv1V>
} j71RlS73
k`NXYf:
public void remove() { b{a\j%
SortUtil.swap(queue,1,size--); U)C>^ !Us
fixDown(1); U[M~O*9
} Pv3qN{265
file://fixdown A+ LX37B
private void fixDown(int k) { 9"f
int j; Y;#H0v>E
while ((j = k << 1) <= size) { _ pO1XM
if (j < size %26amp;%26amp; queue[j] j++; tb;u%{S
if (queue[k]>queue[j]) file://不用交换 $Qcr8~+a
break; g]jCR*]
SortUtil.swap(queue,j,k); 1-~sj)*k
k = j; lX/:e=
} h7J4 p
} Tzr'3m_
private void fixUp(int k) { ^c?$$Tq
while (k > 1) { lt& c/xi_
int j = k >> 1; ]:.9:RmEV
if (queue[j]>queue[k]) ?b xak
break; Ti&v9re%wO
SortUtil.swap(queue,j,k); +l;AL5h
k = j; jS4fANG
} zszx~LSvIT
} bFsJqA.A
RuWu#tk
} QSyPtjg]
7',WLuD
} 7uq^TO>9f
2q ~y\fe
SortUtil： #Q$+AdY|
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package org.rut.util.algorithm; 8K2=WYN
K(rWM>Jv
import org.rut.util.algorithm.support.BubbleSort; h I7ur
import org.rut.util.algorithm.support.HeapSort; SHRn$<
import org.rut.util.algorithm.support.ImprovedMergeSort; oa6&?4K?F
import org.rut.util.algorithm.support.ImprovedQuickSort; [ps5
import org.rut.util.algorithm.support.InsertSort; A$-\Er+f
import org.rut.util.algorithm.support.MergeSort; s^HI%mdf
import org.rut.util.algorithm.support.QuickSort; U U@
import org.rut.util.algorithm.support.SelectionSort; Aaz2._:/-m
import org.rut.util.algorithm.support.ShellSort; ,tak{["
0X}0,
/** o_n 3.O=
* @author treeroot V z-]H]MW,
* @since 2006-2-2 3`Gb;D
* @version 1.0 i=jYl
*/ IC+!XZqS
public class SortUtil { k1~? }+<e
public final static int INSERT = 1; 6&_K;
public final static int BUBBLE = 2; d0;<Cw~Tl
public final static int SELECTION = 3; v$#l]A_D
public final static int SHELL = 4; Ch73=V
public final static int QUICK = 5; F"0=r
public final static int IMPROVED_QUICK = 6; CvRO'
public final static int MERGE = 7; @|<qTci
public final static int IMPROVED_MERGE = 8; z m+3aF
public final static int HEAP = 9; Lm*PHG
ftD(ed
public static void sort(int[] data) { Y{9xF8#
sort(data, IMPROVED_QUICK); >1hhz
} U&0 RQ:B
private static String[] name={ 3f(tb%pa5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pxf/*z
}; :ka^ztXG
$ EexNz
private static Sort[] impl=new Sort[]{ qK]Om6 a~
new InsertSort(), 7yUX]95y8
new BubbleSort(), VM<$!Aaz
new SelectionSort(), vr }-u
new ShellSort(), JC iB;!y
new QuickSort(), $'3'[Nr(;t
new ImprovedQuickSort(), e?+&2zMq
new MergeSort(), vsJM[$RF
new ImprovedMergeSort(), %Ot*k%F
new HeapSort() j+("4b'
}; BbhC0q"J
yiMqe^zy
public static String toString(int algorithm){ C(kL=WD
return name[algorithm-1]; V/BU(`~i
} v {)8QF]
iw{^nSD
public static void sort(int[] data, int algorithm) { MH|R@g
impl[algorithm-1].sort(data); bWJ&SR>
} =k5O*ql"
RLfB]\w
public static interface Sort { i5SDy(?r
public void sort(int[] data); kAq#cLprG
} myF/_o&Ty
~.CmiG.7
public static void swap(int[] data, int i, int j) { (U@$gkUx}G
int temp = data; !\!j?z=O8
data = data[j]; f o idneus
data[j] = temp; XrI$@e*
} v1p^="IHI
} &]pY~zVc