[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; @5!Mr5;
} y9cDPwi:b
int i1=l; VQ5D?^'0/
int i2=mid+1; >+iJ(jqq
for(int cur=l;cur<=r;cur++){ *;QIAd
if(i1==mid+1) b^wL{q
data[cur]=temp[i2++]; &_-,Nxsf
else if(i2>r) l^ P[nQDH
data[cur]=temp[i1++]; &@tD/Jw3
else if(temp[i1] data[cur]=temp[i1++]; :a M ZJm
else *f%uc
data[cur]=temp[i2++]; si:p98[w
} UEZnd8
} p5|.E
+FD"8 ^YC
} :Ve>tZeW
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改进后的归并排序: xV&c)l>}
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package org.rut.util.algorithm.support; sN`2"t/s
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import org.rut.util.algorithm.SortUtil; e6E{l
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/** #k%$A}9
* @author treeroot &cDLSnR
* @since 2006-2-2 Hc`)Q vFRW
* @version 1.0 EwvW: t1
*/ 4~mYj@lvd
public class ImprovedMergeSort implements SortUtil.Sort { WmO.&zp
BI\ )vr$
private static final int THRESHOLD = 10; ]JQ7x[
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/* $#3O:aW
* (non-Javadoc) {}r#s>
* : GVyY]qBU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0E*q-$P
*/ a$0,T_wD
public void sort(int[] data) { zX{O"w
int[] temp=new int[data.length]; SG:Fn8
mergeSort(data,temp,0,data.length-1); [$PW {d8|
} /NFk@8<?
2YT1]x 3
private void mergeSort(int[] data, int[] temp, int l, int r) { Af~>}-`a
int i, j, k; ObK-<kGcB
int mid = (l + r) / 2; ]mDsd*1
if (l == r) {+`'ZU6C
return; vL>cYbJ<
if ((mid - l) >= THRESHOLD) _[D6WY+
mergeSort(data, temp, l, mid); *C/bf)w
else ,t"?~Hl".
insertSort(data, l, mid - l + 1); =<,>dBs}\
if ((r - mid) > THRESHOLD) yQAW\0`
mergeSort(data, temp, mid + 1, r); Y nD_:ZK
else :c4iXK0_^?
insertSort(data, mid + 1, r - mid); *P\$<4l
tM&O<6Y
for (i = l; i <= mid; i++) { ]>j>bHG
temp = data; e70#"~gt[
} _ELuQ>zM]+
for (j = 1; j <= r - mid; j++) { MIV<"A
temp[r - j + 1] = data[j + mid]; L="ipM:Z
} h(M_ K
int a = temp[l]; #b u]@/
int b = temp[r]; <OX_6d*@
for (i = l, j = r, k = l; k <= r; k++) { ( (.b&
if (a < b) { OvL@@SX |
data[k] = temp[i++]; 9T`$gAI
a = temp; pD^7ZE6
} else { WJ%4IaT
data[k] = temp[j--]; ,]A|z ~q
b = temp[j]; 5Q)hl.<{o7
} @1+gY4g
} _/FpmnaY
} z|KQiLza
T\ixS-%^
/** XH^X4W
* @param data \fX0&l;T9\
* @param l g0Rny
* @param i ua!i3]18
*/ !p:kEIZ)y
private void insertSort(int[] data, int start, int len) { Ge'[AhA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `S`,H
} j ^Tb=
} 8IeE7
} uPe&i5YR
} p(B^](?
,, 8hU7P
堆排序： 3shRrCL0mf
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package org.rut.util.algorithm.support; Eo\pNz#)
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import org.rut.util.algorithm.SortUtil; )Y@E5Tuk>
wwvS05=[T
/** ,@\$PyJ
* @author treeroot /$z(BX/
* @since 2006-2-2 xE$>;30b_
* @version 1.0 L=7Y~aL=
*/ y cT@D/
public class HeapSort implements SortUtil.Sort{ L<7KmN4VX
-0I]Sm;$
/* (non-Javadoc) 0mt lM(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UFE# J
*/ Q1Jw7R#?l
public void sort(int[] data) { "b~-`ni
MaxHeap h=new MaxHeap(); Gy]ZYo(
h.init(data); QL].)Vgf
for(int i=0;i h.remove(); jDO"?@+
System.arraycopy(h.queue,1,data,0,data.length); [:hTwBRF
} sKg IKYG}T
@IXvp3r
private static class MaxHeap{ "dkDT7
/JqNiqvh
void init(int[] data){ >'eY/>n{
this.queue=new int[data.length+1]; j1Ns|oph1
for(int i=0;i queue[++size]=data; bjL8Wpk
fixUp(size); a)o-6
} q0m>NA
} b] EC+.
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private int size=0; T{CCZ"Fv
9Sb[5_Q
private int[] queue; e) \PW1b
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public int get() { *GZ7S m
return queue[1]; |8{c|Qz
} ZwFVtR
M?gc&2Y
public void remove() { G7qB
SortUtil.swap(queue,1,size--); kd=|Iip;(
fixDown(1); h,*-V 'X.k
} kB! iEoIBA
file://fixdown y/.I<5+Bu
private void fixDown(int k) { e{Y8m Xu
int j; Jan~Rran
while ((j = k << 1) <= size) { hZwbYvu
if (j < size %26amp;%26amp; queue[j] j++; 4[XiD* *
if (queue[k]>queue[j]) file://不用交换 Fkvf[!Ci
break; Qi;62M
SortUtil.swap(queue,j,k); Ya*<me>`
k = j; -d*zgP
} lZ*V.-D^]
} S^c;i
private void fixUp(int k) { WV8vDv1jt
while (k > 1) { n:8<Ijrh
int j = k >> 1; V[#$Sz[G
if (queue[j]>queue[k]) 8[B0[2O
break; BO%aCK&
SortUtil.swap(queue,j,k); Y& p ~8
k = j; Hob n{E
} :z^,>So:
} 1sIPhOIys
8XG|K`'u
} k .#I ;7
j /)A<j$
} FoX,({*Ko~
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SortUtil： %E"dha JY
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package org.rut.util.algorithm; /cX%XZg
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import org.rut.util.algorithm.support.BubbleSort; bH Nf>
import org.rut.util.algorithm.support.HeapSort; 5OM*NT t
import org.rut.util.algorithm.support.ImprovedMergeSort; '89nyx&W
import org.rut.util.algorithm.support.ImprovedQuickSort; .At^b4#(
import org.rut.util.algorithm.support.InsertSort; @c-| Sl
import org.rut.util.algorithm.support.MergeSort; 0F-%C>&g
import org.rut.util.algorithm.support.QuickSort; EEp~\^-
import org.rut.util.algorithm.support.SelectionSort; ra|Ku!
import org.rut.util.algorithm.support.ShellSort; 3+WmM4|
dr gCr:Gf
/** x:E:~h[.^
* @author treeroot \LYNrL~?J
* @since 2006-2-2 h|{DIG3
* @version 1.0 CeINODcT
*/ o:c:hSV
public class SortUtil { MC~<jJ,
public final static int INSERT = 1; \"|7o8
public final static int BUBBLE = 2; vUR@P -
public final static int SELECTION = 3; wv.HPmq
public final static int SHELL = 4; TMG|"|
public final static int QUICK = 5; 8D&yFal
public final static int IMPROVED_QUICK = 6; SH5a&OVZhn
public final static int MERGE = 7; pmuT7*<19
public final static int IMPROVED_MERGE = 8; DmiZ"A
public final static int HEAP = 9; =`OnFdI
Fql|0Fq
public static void sort(int[] data) { `9&~fWu
sort(data, IMPROVED_QUICK); 3{{Ew}kZm
} G0lg5iA<fC
private static String[] name={ r E&}B5PN=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2o<aEn&7|e
}; ~F.kgX
ZkqZO#nq C
private static Sort[] impl=new Sort[]{ Zv5vYe9Ow
new InsertSort(), XR+
new BubbleSort(), {lbNYjknS
new SelectionSort(), l&_PsnU
new ShellSort(), 1xDh[:6
new QuickSort(), q+U&lw|"w
new ImprovedQuickSort(), !%(PN3*
new MergeSort(), Ya29t98Pk
new ImprovedMergeSort(), Jy P$'v~
new HeapSort() >c=-uI
}; D zdKBJT+
K)#6&\0tT
public static String toString(int algorithm){ %cl{J_}{&
return name[algorithm-1]; 6){nu rDBG
} ,FK.8c6g
<AN5>:k[pM
public static void sort(int[] data, int algorithm) { 7_~_$I~g*
impl[algorithm-1].sort(data); x-s\0l
} 'Gqo{wl
4Cp)!Bq?/
public static interface Sort { $QnsP#ePN
public void sort(int[] data); 6 2LLfD
} dYZB> OS
t[p/65L>8
public static void swap(int[] data, int i, int j) { E]0Qz? W
int temp = data; 5"&=BD~D
data = data[j]; .\7AJB\l
data[j] = temp; ~BC~^D&WD
} $ qTv2)W1{
} ,*Z/3at}5M