[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; #ws6z`mt
} pz(clTOD:
int i1=l; ?C_%"!GR
int i2=mid+1; F"LT\7yjyG
for(int cur=l;cur<=r;cur++){ CNzK-,
if(i1==mid+1) ]M_)f
data[cur]=temp[i2++]; 4;_.|!LN
else if(i2>r) Q)v8hNyUmA
data[cur]=temp[i1++]; sQR;!-j
else if(temp[i1] data[cur]=temp[i1++]; ;qvZ*
else b{(:'.
data[cur]=temp[i2++]; a-7nA
} r+>9O
} "~GudK &
pt=[XhxC(>
} H`fkds
:QN,T3i'/3
改进后的归并排序: \4V'NTjB
GU!|J71z
package org.rut.util.algorithm.support; aPWFb.JO4
[QeKT8
import org.rut.util.algorithm.SortUtil; "5{\0CfS
4((Z8@iX/
/** 9~N7hLT
* @author treeroot %e_WO,R
* @since 2006-2-2 -cG?lEh<
* @version 1.0 B3K%V|;z )
*/ ]SK(cfA`
public class ImprovedMergeSort implements SortUtil.Sort { e{"d6pF=
lk8VJ~2d
private static final int THRESHOLD = 10; YTY0N5["
h1,J<B@
/* L&l>?"_
* (non-Javadoc) `OduBUI]]
* |GIT{_JE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #*w$JH
*/ Q&wBX%@^L
public void sort(int[] data) { S!rUdxO
int[] temp=new int[data.length]; 3n X7$$X
mergeSort(data,temp,0,data.length-1); =\`9\Gd
} tr):n@
csYICLj
private void mergeSort(int[] data, int[] temp, int l, int r) { kD2MqR>
int i, j, k; Yzd-1Jvk
int mid = (l + r) / 2; _oR6^#5#
if (l == r) 5o&L|7]
return; NAL%qQ
if ((mid - l) >= THRESHOLD) 5-n N8qs
mergeSort(data, temp, l, mid); @w@rW }i0
else x`a@h\n
insertSort(data, l, mid - l + 1); <OpiD%Ctx
if ((r - mid) > THRESHOLD) u K 8r
mergeSort(data, temp, mid + 1, r); .2OP>:9F
else 0(teplo&P
insertSort(data, mid + 1, r - mid); OS,-dG(
nQ8EV>j2
for (i = l; i <= mid; i++) { =_=jXWOQv
temp = data; )5&Wt@7Kj`
} >4bOM@[]
for (j = 1; j <= r - mid; j++) { ARslw*SJ
temp[r - j + 1] = data[j + mid]; !iITX,'8
} AX[/S8|6
int a = temp[l]; G>cTqD6gT
int b = temp[r]; `lr\V;o!
for (i = l, j = r, k = l; k <= r; k++) { Jg^tr>I~
if (a < b) { }eBy p
data[k] = temp[i++]; 3&_(D)+
a = temp; g=a-zg9LX
} else { ""TRLs!:M
data[k] = temp[j--]; 0M pX.0
b = temp[j]; D7 A{*Tm
} #uKHw2N
} fyT!/
} IiSO{
3vDV
/** ;9d(GP}eE
* @param data V.;0F%zks5
* @param l 7M5HIK6_
* @param i T7&itgEYG/
*/ <4^a(Zh
private void insertSort(int[] data, int start, int len) { @ -g^R4e<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *j8w" 4
} &:w{[H$-
} :'#BU:
} hnL(~
} %kKtPrT
jUdW o}/
堆排序： &9IMZAo
BYP,}yzA
package org.rut.util.algorithm.support; !dGy"-i$h
4{*K%pv\
import org.rut.util.algorithm.SortUtil; UIbVtJ
(Z sdj
/** l0Y(9(M@
* @author treeroot foaNB=,
* @since 2006-2-2 ai#0ZgO
* @version 1.0 wN"irXG
*/ Kq{9:G
public class HeapSort implements SortUtil.Sort{ eRC@b^~
mii9eZ
/* (non-Javadoc) IN),Lu0K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,NKDEcw]
*/ 0p:n'P
public void sort(int[] data) { ^25$=0
MaxHeap h=new MaxHeap(); #>[+6y]U!
h.init(data); v-4eN1OS
for(int i=0;i h.remove(); t~gnai
System.arraycopy(h.queue,1,data,0,data.length); qky{]qNW
} UP%X`
v&p\r'w
private static class MaxHeap{ Ch^Al2)=
G,$RsP
void init(int[] data){ %;9wToyK>
this.queue=new int[data.length+1]; |\Jpjm)?
for(int i=0;i queue[++size]=data; 2~~Q NWN
fixUp(size); z&9vKF
} w9l)=[s=
} ?zKDPBj
*}cF]8c5W
private int size=0; MZ6?s(mkx
ppfBfMX
private int[] queue; L)4TW6IUk
B4_0+K H
public int get() { X|@|ZRN
return queue[1]; &nTB^MF
} *_3+ DF
/k(0}g=\
public void remove() { :1=mNrg
SortUtil.swap(queue,1,size--); Jc:*X4-'
fixDown(1); .Mdxbs6.C
} D@FJVF7c
file://fixdown og!Uq]U/y
private void fixDown(int k) { \"5%w *vl
int j; _D[vMr[
while ((j = k << 1) <= size) { |Zncr9b
if (j < size %26amp;%26amp; queue[j] j++; GYyP+7K4l[
if (queue[k]>queue[j]) file://不用交换 r4D6g>)h1q
break; l^WFMeMD3a
SortUtil.swap(queue,j,k); ,B h[jb`y
k = j; )#M*@e$k
} Ga"$_DyM
} 5}E8Tl
private void fixUp(int k) { kMf]~EZ?
while (k > 1) { )nTOIfP2
int j = k >> 1; mvlK~c8
if (queue[j]>queue[k]) n"-cX)
break; J*A<F'^F1
SortUtil.swap(queue,j,k); )!e-5O49r
k = j; Ri"3o
} z9u"?vdA
} XM>ByfD{
O83vPK 3
} hA/K>Z
sGc4^Z%l?
} n\ZDI+X
9=K=gfZ
SortUtil： (]0ZxWF
a&M{y
package org.rut.util.algorithm; Oy&Myjny<
IH'DCY:
import org.rut.util.algorithm.support.BubbleSort; >jq~5HN
import org.rut.util.algorithm.support.HeapSort; $@7S+'Q3
import org.rut.util.algorithm.support.ImprovedMergeSort; b-;+&Rb
import org.rut.util.algorithm.support.ImprovedQuickSort; B}C"Xc
import org.rut.util.algorithm.support.InsertSort; Zii<jZ.)<
import org.rut.util.algorithm.support.MergeSort; P<km?\Xp(
import org.rut.util.algorithm.support.QuickSort; -_4U+Cfmtl
import org.rut.util.algorithm.support.SelectionSort; MX xRM~
import org.rut.util.algorithm.support.ShellSort; xmT(yv,
Ck/4hZ
/** Ti=~ycwi
* @author treeroot \:'=ccf
* @since 2006-2-2 :(!il?
* @version 1.0 AJI,>I,}}
*/ 9=&LMjTQ
public class SortUtil { ZBB^?FF
public final static int INSERT = 1; yo#&>W
public final static int BUBBLE = 2; C3:4V2<_
public final static int SELECTION = 3; +79?}|
public final static int SHELL = 4; k]] (I<2
public final static int QUICK = 5; F]q pDv
public final static int IMPROVED_QUICK = 6; Yvcd(2
public final static int MERGE = 7; ]o6Or,ml
public final static int IMPROVED_MERGE = 8; XA-DJ
public final static int HEAP = 9; ~Q0gSazXFt
)K4 |-<i
public static void sort(int[] data) { a.y_o50#T
sort(data, IMPROVED_QUICK); S=n,unn#t
} ?ye)&
private static String[] name={ <9@I50;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZYos.ay
}; e@Q<hb0<eU
YrS%Yvhj0
private static Sort[] impl=new Sort[]{ 0-oR { {
new InsertSort(), AL>*Vj2h/n
new BubbleSort(), !=V>DgmW
new SelectionSort(), -y1%c^36_J
new ShellSort(), $21+6
new QuickSort(), _O Tqm5_
new ImprovedQuickSort(), Ayadvi(@P
new MergeSort(), "~jt0pp
new ImprovedMergeSort(), YYzj:'
new HeapSort() Q *![u5#
}; h1^q};3!W\
~ou*' w@
public static String toString(int algorithm){ -%I]Q9
return name[algorithm-1]; }:5AB93(
} sZ/~pk
eva-?+n\q
public static void sort(int[] data, int algorithm) { =cs;avtL
impl[algorithm-1].sort(data); )Fe-C
} l4I@6@
ZTfs&5
public static interface Sort { D0Oh,Fe#M\
public void sort(int[] data); <(TTYf8lS
} (f,D$mX
0Y,_ DU
public static void swap(int[] data, int i, int j) { 7?:7}xb-
int temp = data; iov55jT~l@
data = data[j]; 6kK\nZ$o$
data[j] = temp; (30{:o&^
} ;;pxI5
} c^S^"M|