[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; sMLXn]m
} vMY!Z1.*
int i1=l; CY=lN5!J
int i2=mid+1; I\Y N!
for(int cur=l;cur<=r;cur++){ KO`dAB F}
if(i1==mid+1) Ze/\IBd
data[cur]=temp[i2++]; \R9izuc9
else if(i2>r) [zl4"|_`
data[cur]=temp[i1++]; oumbJ7X=L
else if(temp[i1] data[cur]=temp[i1++]; e)s l
else cD9U^SOS
data[cur]=temp[i2++]; w3VgGc~
} 8_wh9
} 1\{FKOt
AcJrJS)~
} HS*Y%*
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改进后的归并排序: u)zv`m
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package org.rut.util.algorithm.support; =i}lh}(
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import org.rut.util.algorithm.SortUtil; G]$EIf'
UvU@3[fw
/** $KT)Kz8tF
* @author treeroot )zy;!
* @since 2006-2-2 <l!:#u
* @version 1.0 tZx}/&m-
*/ amExZ/
public class ImprovedMergeSort implements SortUtil.Sort { s;l"'6:_
&E6V'*<93
private static final int THRESHOLD = 10; mcidA%
o&M.9V?~~
/* _PGd\>Ve
* (non-Javadoc) 0nBDF79
* b)#rUI|O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g9;s3qXiG
*/ `gCJ[
public void sort(int[] data) { `t9k!y!GV
int[] temp=new int[data.length]; g[O
mergeSort(data,temp,0,data.length-1); a*}>yad
} 4o";p}[b
*:+ZEFMq
private void mergeSort(int[] data, int[] temp, int l, int r) { K} T=j+
int i, j, k; KSS]%66Y
int mid = (l + r) / 2; R-<8j`[0
if (l == r) ZI4dD.B
return; $!$If( 7
if ((mid - l) >= THRESHOLD) o7Z8O,;
mergeSort(data, temp, l, mid); 2yFT` 5+H4
else _E8Cvaob
insertSort(data, l, mid - l + 1); :.=j)ljTx
if ((r - mid) > THRESHOLD) eU`O=uE
mergeSort(data, temp, mid + 1, r); @(*A<2;N
else 3P>1-=
insertSort(data, mid + 1, r - mid); Dk$<fMS,7c
@vib54G
for (i = l; i <= mid; i++) { R i,_x
temp = data; (GGosXU-v
} (~bx%
for (j = 1; j <= r - mid; j++) { zN;P_@U
temp[r - j + 1] = data[j + mid]; !;vv-v,LQ
} 3G<4rH]
int a = temp[l]; qQ3pe:n?
int b = temp[r]; 2"shB(:z>
for (i = l, j = r, k = l; k <= r; k++) { QBi]gT@&g
if (a < b) { Q}l~n)=
data[k] = temp[i++]; lup2>"?*
a = temp; 5}_=q;sZ
} else { tux0}|[^'
data[k] = temp[j--]; T%FW|jKw
b = temp[j]; Z]tQmV8e
} 79}jK"Gc
} MwQ4&z#wh
} O^6anUV0
D@.qdRc3
/** 5}w
* @param data -I6t ^$HA
* @param l Og@{6>
* @param i $`%Om WW{
*/ NOkgG0Z
private void insertSort(int[] data, int start, int len) { XjP;O,x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); imzPVGCD{
} u)r:0;5
} SsZSR.tD
} z$~F9Es9
} I S'Uuuz7g
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堆排序： '|yCDBu
@-xvdntx
package org.rut.util.algorithm.support; AOKC1iD%Y
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import org.rut.util.algorithm.SortUtil; k.c.7%|~;
1ZRkVHiz0
/** H[OgnnM
* @author treeroot Z zp"CK 5
* @since 2006-2-2 Px*<-t|R-
* @version 1.0 djw\%00&#
*/ goF87^M
public class HeapSort implements SortUtil.Sort{ [eOv fD
v4'kV:;&
/* (non-Javadoc) uPYH3<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) < FO=PM
*/ u,d5/`E
public void sort(int[] data) { )u=W?5%=}
MaxHeap h=new MaxHeap(); y5O &9Ckw
h.init(data); 79d(UG'O
for(int i=0;i h.remove(); XpE847!soL
System.arraycopy(h.queue,1,data,0,data.length); Suo$wZ7J
} }P{Wk7#Jq
[Y@>,B!V
private static class MaxHeap{ H|wP8uQC
]{\M,txo8
void init(int[] data){ 1(:!6PY
this.queue=new int[data.length+1]; <;~u@^>
for(int i=0;i queue[++size]=data; rcMf1\
fixUp(size); y@LiUe5
} esx/{j;<u
} xh9$ZavB*
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private int size=0; m_Q&zp["
_!, J iOI
private int[] queue; q-_!&kDK"
^->S7[N?
public int get() { "&4r!2A
return queue[1]; #)]t4wa_W
} ey4.Hj#T
NIbK3`1
public void remove() { w7Y@wa!
SortUtil.swap(queue,1,size--); 02*qf:kTnA
fixDown(1); 'U`;4AN
} w=rD8@
file://fixdown u-4@[*^T$
private void fixDown(int k) { DC-d@N+
int j; CAs:>s '8
while ((j = k << 1) <= size) { a\}MJ5]
if (j < size %26amp;%26amp; queue[j] j++; iQ2j ejd3(
if (queue[k]>queue[j]) file://不用交换 S >CKm:7
break; %Pt){9b
SortUtil.swap(queue,j,k); /}L2LMIm
k = j; &TA{US3~
} ]Zc|<f;
} -rm[.
private void fixUp(int k) { bGgpPV
while (k > 1) { e3:L]4t
int j = k >> 1; o,*D8[
if (queue[j]>queue[k]) uZ-ZZE C
break; <9yh:1"X
SortUtil.swap(queue,j,k); dpNERc5
k = j; p@4GI[4
} 0NC70+4L
} 7dACbqba
)=29Hm"
} rZaO^}u]
Z f\~Cl
} fC*cqc~{@
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SortUtil： =D Q:0w
p&]V!O
package org.rut.util.algorithm; 1hGj?L0m.
X<[ qX*
import org.rut.util.algorithm.support.BubbleSort; |llJ%JhF
import org.rut.util.algorithm.support.HeapSort; _(kaaWJ
import org.rut.util.algorithm.support.ImprovedMergeSort; 0.n[_?<(
import org.rut.util.algorithm.support.ImprovedQuickSort; W [K.|8ho
import org.rut.util.algorithm.support.InsertSort; Xw!\,"{s
import org.rut.util.algorithm.support.MergeSort; %%uE^nX>
import org.rut.util.algorithm.support.QuickSort; 1d]F$>
import org.rut.util.algorithm.support.SelectionSort; NzP71t+
import org.rut.util.algorithm.support.ShellSort; tS]
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/** <]LljTm`i
* @author treeroot $Emu*'
* @since 2006-2-2 N~mr@rXC
* @version 1.0 FC,=g`Q!
*/ f6`GU$H
public class SortUtil { kv3Dn&<rJ
public final static int INSERT = 1; V<H9KA
public final static int BUBBLE = 2; Op?"G
public final static int SELECTION = 3; <L#d<lx
public final static int SHELL = 4; }>u `8'2v
public final static int QUICK = 5; H%>4z3n
public final static int IMPROVED_QUICK = 6; u%)gnj_
public final static int MERGE = 7; p.=9[`
public final static int IMPROVED_MERGE = 8; 'Uf?-t*LT@
public final static int HEAP = 9; yivu|q
&.*UVc2+Y
public static void sort(int[] data) { 4.jRTL5-oj
sort(data, IMPROVED_QUICK); /]xa}{^B
} 9 =;mY
private static String[] name={ 4#03x:/<\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =ZIT!B?4
}; f=R+]XPzz
gaY&2
private static Sort[] impl=new Sort[]{ i!?gga
new InsertSort(), `9J9[!+!`
new BubbleSort(), _2hLc\#
new SelectionSort(), 8aP/vToa
new ShellSort(), mSxn7LG
new QuickSort(), HN{c)DIm]
new ImprovedQuickSort(), ~dRstH7u
new MergeSort(), cA q3Gh
new ImprovedMergeSort(), 0^-1d2Z~
new HeapSort() WxGD*%
}; hb5K"9Y
;J5z
public static String toString(int algorithm){ x^f)I|t
return name[algorithm-1]; #lP8/-s^
} ;X,u
"[|b,fxR
public static void sort(int[] data, int algorithm) { e}e8WR=B
impl[algorithm-1].sort(data); ns8s2kYcm
} x 6`!
"+"=iwEAz
public static interface Sort { +&`W\?.~
public void sort(int[] data); ilL0=[2
} !rM~
1jl!VU6
public static void swap(int[] data, int i, int j) { E6A"Xo
int temp = data; '3(^Zv
data = data[j]; r<e%;S
data[j] = temp; RU:Rt'
} Y$r78h=4
} WVy'f|3;