[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; JW%/^'
} mSw?2ba
int i1=l; J^g,jBk
int i2=mid+1; lEyG9Xvi
for(int cur=l;cur<=r;cur++){ ENYF0wW
if(i1==mid+1) 7i+!^Qj?y
data[cur]=temp[i2++]; _/N'I7g
else if(i2>r) &Xn8oe
data[cur]=temp[i1++]; ].k+Nzf_
else if(temp[i1] data[cur]=temp[i1++]; ,>QMyI hv
else lZS_n9Sc
data[cur]=temp[i2++]; dxkRk#mf:
} O7'<I|aD
} /.|A
20.-;jK
} d Y:|Ef|v(
U=&^H!LVY
改进后的归并排序: ?2?S[\@`0U
##EB; Y
package org.rut.util.algorithm.support; 8z."X$
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import org.rut.util.algorithm.SortUtil; tL={y*
n2xLgK=
/** kb"_6,[Ms
* @author treeroot m?D <{BQ;
* @since 2006-2-2 o[bE
* @version 1.0 tT@w%Sz57N
*/ nOAJ9
public class ImprovedMergeSort implements SortUtil.Sort { Ge^zX$.'
FGDGWcRw~
private static final int THRESHOLD = 10; z.2r@Psk
*PSvHXNi
/* kCaO\#ta
* (non-Javadoc) AfbB~LlBq
* fBf4]^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DU5:+" u3
*/ v`#j
public void sort(int[] data) { ^CZCZ,v
int[] temp=new int[data.length]; <*s"e)XeqF
mergeSort(data,temp,0,data.length-1); ||-nmOy
} =jg#fdM -
Y7<zm}=(/
private void mergeSort(int[] data, int[] temp, int l, int r) { _BZ1Vnv
int i, j, k; [[R7~.;
int mid = (l + r) / 2; *4<4
if (l == r) H~A"C'P3#
return; [[:UhrH-
if ((mid - l) >= THRESHOLD) ?PBa'g
mergeSort(data, temp, l, mid); YBb)/ZghY
else f~w>v
insertSort(data, l, mid - l + 1); ,:D=gQ@`
if ((r - mid) > THRESHOLD) J|VK P7
mergeSort(data, temp, mid + 1, r); )v[XmJ>H~o
else T vrk^!
insertSort(data, mid + 1, r - mid); s|Z:}W?{
"j{i,&Y$_
for (i = l; i <= mid; i++) { ojHhT\M`
temp = data; K&=D-50%
} n[!;yO
for (j = 1; j <= r - mid; j++) { o^3FL||P#r
temp[r - j + 1] = data[j + mid]; <fN; xIB
} Q,{^S,s<
int a = temp[l]; 8wr8:(Y$
int b = temp[r]; H&M1>JtE
for (i = l, j = r, k = l; k <= r; k++) { tAF]2VV(e
if (a < b) { B[r<m J
data[k] = temp[i++]; ]eE 1n2
a = temp; 93j{.0]X
} else { -<_QF82
data[k] = temp[j--]; AXs=1 e
b = temp[j]; |6aJwe+*
} U4BqO :sd
} ]*qU+&
} >OV<_(S4
B`fH^N
/** ~.J,A\F
* @param data %SAw;ZtQ:
* @param l F|>05>8
* @param i ]4`t\YaT
*/ C5|db{=\.*
private void insertSort(int[] data, int start, int len) { \R(R9cry
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 69-:]7.g
} [E7MsX
} e+.\pe\
} ,MQVE
} j(iuz^I
|~WYEh
堆排序： 5Fmav5
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package org.rut.util.algorithm.support; t V03+&jF
b O=yi)
import org.rut.util.algorithm.SortUtil; w&Y{1rF>
XM/vDdR
/** iXFP5a>|
* @author treeroot X8i(~ B
* @since 2006-2-2 EF#QH _X
* @version 1.0 ib$nc2BPb
*/ KVkMU?6
public class HeapSort implements SortUtil.Sort{ ?P/AC$:|I
`S3>3
/* (non-Javadoc) `pL^}_>|GM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~=En+J}*
*/ /*$hx@ih
public void sort(int[] data) { $bvJTuw
MaxHeap h=new MaxHeap(); hIYTe
h.init(data); S QY"OBo<e
for(int i=0;i h.remove(); C3XmK}h
System.arraycopy(h.queue,1,data,0,data.length); bc I']WgB-
} ~6aCfbu%V
\K iwUz
private static class MaxHeap{ nwA8ALhE
x;LzG t:w
void init(int[] data){ J~#$J&iKh
this.queue=new int[data.length+1]; 1u|V`J)0
for(int i=0;i queue[++size]=data; V0*3;n
fixUp(size); uH@FU60
} 17|np2~
} aG+j9Q_
W_`A"WdT.
private int size=0; ]Mi.f3QlO6
\4d.sy0&>-
private int[] queue; DgHaOAdU
\ %=9
public int get() { FLZWZ;
return queue[1]; $((6=39s
} N587(wZ
#A7jyg":
public void remove() { 5O/i3m26
SortUtil.swap(queue,1,size--); 3+Qxg+<
fixDown(1); D*PYr{z'
} w|[RDaAb
file://fixdown Pmg)v!"
private void fixDown(int k) { ~EzaC?fQ
int j; .|qK+Hnc
while ((j = k << 1) <= size) { 8~lIe:F-
if (j < size %26amp;%26amp; queue[j] j++; U69u'G:
if (queue[k]>queue[j]) file://不用交换 Y-mK+12
break; I<td1Y1q
SortUtil.swap(queue,j,k); +=q)
k = j; *l+OlQI0+
} -t2T(ha
} *OJ/V O
private void fixUp(int k) { Kv'n:z7Md
while (k > 1) { l%ayI
int j = k >> 1; )tHaB,
if (queue[j]>queue[k]) ^N}Wnk7ks'
break; =L|tp%!
SortUtil.swap(queue,j,k); aNn"X y\ k
k = j; E/&Rb*3
} im} ?rY
} `1*nL,i
=*qD4qYA
} ml0.$z
GZS1zTwBL
} w=]Ks'C]
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SortUtil： /+*#pDx/zW
=deMd`=J
package org.rut.util.algorithm; ;*ix~taL%
`RU[8@ 2%
import org.rut.util.algorithm.support.BubbleSort; ^;,M}|<h
import org.rut.util.algorithm.support.HeapSort; taGU
import org.rut.util.algorithm.support.ImprovedMergeSort; 6qN~/TnHZ
import org.rut.util.algorithm.support.ImprovedQuickSort; 09A X-JP
import org.rut.util.algorithm.support.InsertSort; >Vy>O&r
import org.rut.util.algorithm.support.MergeSort; H>9CW<8
import org.rut.util.algorithm.support.QuickSort; f/WQ[\<!I
import org.rut.util.algorithm.support.SelectionSort; MuoF FvAA
import org.rut.util.algorithm.support.ShellSort; 7Dnp'*H
;.xoN|Per
/** 1Je9,dd6
* @author treeroot +3s%E{
* @since 2006-2-2 8+]hpa,q
* @version 1.0 m)V/L]4
*/ D=:04V}2+
public class SortUtil { ,+`61J3W
public final static int INSERT = 1; #;n+YM">:
public final static int BUBBLE = 2; M"%Q&o/I
public final static int SELECTION = 3; ??TMSH
public final static int SHELL = 4; yc|VJ2R*
public final static int QUICK = 5; E_KCNn-f
public final static int IMPROVED_QUICK = 6; bjAnaya
public final static int MERGE = 7; pg]BsJN
public final static int IMPROVED_MERGE = 8; 1n%?@+W
public final static int HEAP = 9; 3@5=+z~CW
aP'"G^F
public static void sort(int[] data) { 8|E'>+ D_-
sort(data, IMPROVED_QUICK); ih?^t(i
} ?+T^O?r|O
private static String[] name={ Kwc6mlw~M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \om%Q[F7a
}; {3N'D2N
L4uFNM]
private static Sort[] impl=new Sort[]{ OL_{_K(w
new InsertSort(), 8M@BG8
new BubbleSort(), 0%!rx{f#\
new SelectionSort(), uEc<}pV
new ShellSort(), - 0?^#G}3}
new QuickSort(), GUslPnG
new ImprovedQuickSort(), cb5,P~/q
new MergeSort(), 2Z20E$Cb
new ImprovedMergeSort(), 42>Ge>#F
new HeapSort() Qt]Q:9I[
}; {'16:dTJ
'!f5?O+E
public static String toString(int algorithm){ R |KD&!~Z
return name[algorithm-1]; 9&RFO$WH
} 29XL$v],
A(]H{>PMy
public static void sort(int[] data, int algorithm) { vkLC-Mzm<
impl[algorithm-1].sort(data); ;[RZ0Uy=
} nx0K$Ptq
+cU>k}
public static interface Sort { qRbf2;
public void sort(int[] data); h*u`X>!!
} k+1|I)z
?eV4SH
public static void swap(int[] data, int i, int j) { +a^F\8H
int temp = data; 5BBD.!
data = data[j]; /%lZu^
data[j] = temp; fib}b?vk
} :!zl^J;
} &@ JvnO: