[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; DVNGV
} #Pulbk8
int i1=l; @]#0jiS
int i2=mid+1; Gw$sL&1m\
for(int cur=l;cur<=r;cur++){ @JWoF^U
if(i1==mid+1) aNpeePF)z
data[cur]=temp[i2++]; [*j C
else if(i2>r) yuvt<kz
data[cur]=temp[i1++]; ;u'mSJI'
else if(temp[i1] data[cur]=temp[i1++]; tZ]|3wp
else >Udb*76 D
data[cur]=temp[i2++]; ~R]E=/m|
} {Tp0#fi
} p0xd c3
tj ,*-).4%
} Eg"DiI)7
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改进后的归并排序: ,R1`/aRy
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package org.rut.util.algorithm.support; eiJO;%fl>l
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import org.rut.util.algorithm.SortUtil; bUC-}
fn zj@_{|
/** @xJ qG"
* @author treeroot 9lA@ K[
* @since 2006-2-2 PnsQ[}.
* @version 1.0 oQC*d}_E}
*/ l[O!_bH
public class ImprovedMergeSort implements SortUtil.Sort { 2roPZj
h94SLj]
private static final int THRESHOLD = 10; ^A^,/3
`~hAXnQK=
/* 8x jJ
* (non-Javadoc) BYEqTwhT&
* w0Fi~:b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8u$Krq
*/ PXcpROg56
public void sort(int[] data) { oW-Tw@D
int[] temp=new int[data.length]; N5rY*S
mergeSort(data,temp,0,data.length-1); cWl)ZE<hM
} (XJehdB0
zYdSg<[^
private void mergeSort(int[] data, int[] temp, int l, int r) { BciwS_Qx
int i, j, k; x\XgQQ]-
int mid = (l + r) / 2; V#1_jxP)Q
if (l == r) X-! yi
return; ~1pJQ)!zlq
if ((mid - l) >= THRESHOLD) @5H1Ni5/o@
mergeSort(data, temp, l, mid); o$m64l
else br}.s@~
insertSort(data, l, mid - l + 1); *$x/(!UE
if ((r - mid) > THRESHOLD) >\K<q>*
mergeSort(data, temp, mid + 1, r); /d5_-AB(v
else YH^_d3A;
insertSort(data, mid + 1, r - mid); d3T|N\(DL
(|Am
for (i = l; i <= mid; i++) { }$V]00 X
temp = data; 5j`"@C5;O
} l/yLSGjM
for (j = 1; j <= r - mid; j++) { EA2BN}
temp[r - j + 1] = data[j + mid]; |H5){2V>K
} )1O *~%
int a = temp[l]; _> .TB\
int b = temp[r]; N~ljU;wo-9
for (i = l, j = r, k = l; k <= r; k++) { Qp<?[C}'W
if (a < b) { TH/!z,(>
data[k] = temp[i++]; MC/$:PV
a = temp; sMli!u
} else { #$%9XD3
data[k] = temp[j--]; .9> er
b = temp[j]; YL&$cT]1
} it\{#rb=4
} a=k+:=%y
} XZuJ<]}X,
bK; -Xcm
/** Z;XR%n8
* @param data dY/=-ymW
* @param l Y>EwU
* @param i q|om^:n.
*/ ~R/7J{Sg
private void insertSort(int[] data, int start, int len) { e%N\Pshgv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z?[;Japg
} H|T:_*5
} &qFdP'E;$
} F {]:
} @y->4`N
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堆排序： ^o"9f1s5
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package org.rut.util.algorithm.support; <(?ahO5
jt tlzCDn
import org.rut.util.algorithm.SortUtil; Gu~y/CE'
N2;T\xx,
/** |A7Yv
* @author treeroot :D-d`OyjG>
* @since 2006-2-2 Ka2U@fK"
* @version 1.0 `8\pihww
*/ QY-P!JD
public class HeapSort implements SortUtil.Sort{ >Fz_]z
Y:G6Nd VFM
/* (non-Javadoc) B8Jev\_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'rHkJ
*/ Iqe4O~)
public void sort(int[] data) { %B3E9<9>U
MaxHeap h=new MaxHeap(); ;e()|
h.init(data); 88d0`6K-9
for(int i=0;i h.remove(); y ']>J+b0
System.arraycopy(h.queue,1,data,0,data.length); H0 km*5Sn
} tHXt*tzq
dI-=0v-|
private static class MaxHeap{ w48T?
q>r9ooN
void init(int[] data){ B c*Rn3i@
this.queue=new int[data.length+1]; j)C%zzBu(
for(int i=0;i queue[++size]=data; <|Bh;;
fixUp(size); h(]O;a-
} J^pL_
} +f+x3OMX3
VGM8&J{o'
private int size=0; h -+vM9j
!zvKl;yT
private int[] queue; it5].A&
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public int get() { c_O|?1
return queue[1]; QgEG%YqB
} bL!NT}y`
s41<e"
public void remove() { wX#=l?,K
SortUtil.swap(queue,1,size--); 8~EDmg[
fixDown(1); /%$'N$@f
} Cq u/(=
file://fixdown vC$[Zm
private void fixDown(int k) { QZ"Lh
int j; j3P)cz-0/L
while ((j = k << 1) <= size) { er,R}v
if (j < size %26amp;%26amp; queue[j] j++; 9X@y*;w<t
if (queue[k]>queue[j]) file://不用交换 zbx,qctYo$
break; Yj/S(4(h?
SortUtil.swap(queue,j,k); #_QvnQ?I
k = j; engql;
} QSAz:Yvf|
} G#Nh)ff
private void fixUp(int k) { . CLiv
while (k > 1) { w%VHq z$
int j = k >> 1; %xyt4}-)m
if (queue[j]>queue[k]) aoco'BR F
break; y{s?]hLk
SortUtil.swap(queue,j,k); N3MMxm_u
k = j; bh6Mh<+
} g/mVd;#o
} Up*p*(d3
V(=~p[
} 6WgGewn
jkFS=eonK
} _wCp.[3?t
ub{<m^|)
SortUtil： gr4Hh/V
4.|]R8Mn
package org.rut.util.algorithm; I`t"Na2i
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import org.rut.util.algorithm.support.BubbleSort; d&(GIH E&d
import org.rut.util.algorithm.support.HeapSort; X{9D fgW
import org.rut.util.algorithm.support.ImprovedMergeSort; K:V_,[gO
import org.rut.util.algorithm.support.ImprovedQuickSort; }v;@1[.B
import org.rut.util.algorithm.support.InsertSort; c*1t<OAS~
import org.rut.util.algorithm.support.MergeSort; 68*h#&
import org.rut.util.algorithm.support.QuickSort; vXR-#MS`}
import org.rut.util.algorithm.support.SelectionSort; @PZ&/F^
import org.rut.util.algorithm.support.ShellSort; a_L&*%;
f&js,NU"
/** )2g\GRg6
* @author treeroot 9|D!&=8
* @since 2006-2-2 n9050&_S
* @version 1.0 ?<#6=
*/ rfkk3oy
public class SortUtil { dum! AO
public final static int INSERT = 1; YCj"^RC^
public final static int BUBBLE = 2; 8 %Lq~lk
public final static int SELECTION = 3; *"P :ySA
public final static int SHELL = 4; Cl6y:21]K
public final static int QUICK = 5; 1[[` ^v
public final static int IMPROVED_QUICK = 6; u<]-%ha$
public final static int MERGE = 7; TCX*$ac"
public final static int IMPROVED_MERGE = 8; &0It"17Ej
public final static int HEAP = 9; @7"xDgA
yj `b-^$?
public static void sort(int[] data) { M9_ y>N[0
sort(data, IMPROVED_QUICK); Nw+0b4{
} S?D|"#-,
private static String[] name={ pez[qs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6U @3 xU`
}; zKx?cEpE
kmi[u8iXD_
private static Sort[] impl=new Sort[]{ ?#<Fxme
new InsertSort(), y"]?TEd
new BubbleSort(), I+!w9o2nZ
new SelectionSort(), "e69aAA,
new ShellSort(), q+19EJ(
new QuickSort(), [~W"$sT
new ImprovedQuickSort(), #@;RJJZg
new MergeSort(), mK%!9F V
new ImprovedMergeSort(), V);{o>%.K
new HeapSort() >e/;
}; -=&r}/&
ua0`&,a3I
public static String toString(int algorithm){ WQ\'z?P
return name[algorithm-1]; %+L:Gm+^g#
} f h)Cz)
I')URk[
public static void sort(int[] data, int algorithm) { 2Y(Phw2%
impl[algorithm-1].sort(data); ~x)Awdlu
} QjWv?tm
'aBX>M
public static interface Sort { u&I?LZ-=,
public void sort(int[] data); TKx.`Cf m
} ecA:y!N
g:dw%h
public static void swap(int[] data, int i, int j) { "w*VyD
int temp = data; z\pT nteO
data = data[j]; U?[a@Hj{
data[j] = temp; }W#Gf.$6C
} kUUN2
} *Y?rls`