[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; {*g{9`
} F4"bMN
int i1=l; wxBZ+UP_
int i2=mid+1; xzfugW
for(int cur=l;cur<=r;cur++){ XV4aR3n{Q
if(i1==mid+1) }X=c|]6i^
data[cur]=temp[i2++]; #PPHxh*S
else if(i2>r) *wX[zO+o
data[cur]=temp[i1++]; [AIqKyIr
else if(temp[i1] data[cur]=temp[i1++]; y=+OC1k\8
else w8N1-D42
data[cur]=temp[i2++]; Y`$\o
} 0 |?N
} 1^GRUbOU[
@q>#]8
} b KIL@AI
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改进后的归并排序: FL^t}vA
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package org.rut.util.algorithm.support; {[/A?AV;F
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import org.rut.util.algorithm.SortUtil; mea} 9]c
@x A^F%(
/** :yi} CM4
* @author treeroot Q3$DX,8?
* @since 2006-2-2 Hd7Vp:KM
* @version 1.0 _akjgwu
*/ v+trHdSBYE
public class ImprovedMergeSort implements SortUtil.Sort { cUd>ahv
jLO$[c`;
private static final int THRESHOLD = 10; P|lDW|}D@
G;pmR^
/* IZ^:wIKo{
* (non-Javadoc) 3QVUWhJ
* +O8zVWr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u#y)+A2&!
*/ T*C F5S
public void sort(int[] data) { Z!fbc#L6
int[] temp=new int[data.length]; ypemp=+(r
mergeSort(data,temp,0,data.length-1); -`z%<)!Y
} >o`+j$j
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private void mergeSort(int[] data, int[] temp, int l, int r) { m!^$_d\%~
int i, j, k; Uugq.'>
int mid = (l + r) / 2; R^$EnrY(<
if (l == r) =b1 y*?
return; X&rsWk
if ((mid - l) >= THRESHOLD) <4@8T7
mergeSort(data, temp, l, mid); N'l2$8
else (]&B'1b
insertSort(data, l, mid - l + 1); 9H:J&'Xi7
if ((r - mid) > THRESHOLD) Zy?!;`c*{
mergeSort(data, temp, mid + 1, r); HFFrS%
else QuI!`/N)z
insertSort(data, mid + 1, r - mid); |f1^&97=+
ZWjje6
for (i = l; i <= mid; i++) { >\J<`
temp = data; ![vy{U.:`
} $[Nf?`f(t_
for (j = 1; j <= r - mid; j++) { 7zU~X,
temp[r - j + 1] = data[j + mid]; U,fPG/9
} vflC{,{=k>
int a = temp[l]; >zw@!1{1
int b = temp[r]; K)[\IJJM
for (i = l, j = r, k = l; k <= r; k++) { kVt/Hhd9
if (a < b) { <HS{A$]
data[k] = temp[i++]; MYz!zI
a = temp; eAjR(\f>
} else { 63$`KG3
data[k] = temp[j--]; lZ2gCZ
b = temp[j]; ]-a/)8
} G-]<+-Q$4
} OR'e!{
} Nr)DU.f
-?{g{6
/** pX!T; Re;
* @param data Ad3TD L?
* @param l $3ZQ|X[|+
* @param i ]]}iSw'
*/ Iue=\qUK^
private void insertSort(int[] data, int start, int len) { 2,Z@<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X>o*eN
} Ky8,HdAq
} $/(``8li_
} [(TmAEON
} I4UsDs*BD
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堆排序： g1y@z8Z{
h. 4#C}> )
package org.rut.util.algorithm.support; K*1]P ar;
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import org.rut.util.algorithm.SortUtil; 86?~N
maQxU(
/** e8xNZG;
* @author treeroot jJ2{g> P0P
* @since 2006-2-2 {3K]Q=
* @version 1.0 ,Tx38
*/ ~-%z:Re'_
public class HeapSort implements SortUtil.Sort{ ZdPqU\G^q
_ogN
/* (non-Javadoc) f8f3[O!x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yw7bIcs|#b
*/ meThjCC
public void sort(int[] data) { Y=<zR9f`
MaxHeap h=new MaxHeap(); SymlirL
h.init(data); >>y\idg&:
for(int i=0;i h.remove(); ]z=dRq
System.arraycopy(h.queue,1,data,0,data.length); N6S@e\*
} pRsIi_~&
d}Y#l}!E6
private static class MaxHeap{ sE{5&aCSR
n3eWqwQ$5
void init(int[] data){ E\9HZ;}G
this.queue=new int[data.length+1]; 5UK}AkEe&x
for(int i=0;i queue[++size]=data; qkC{IBN92
fixUp(size); QMX
} #BH]`A J
} X_rv}
eE\T,u5:
private int size=0; KMl3`+i
9>&p:+D
private int[] queue; &=T>($3r94
'*&V7:
public int get() { wLE|J9t%Ea
return queue[1]; o{hZjn-
} 3(*vZ
i_`Po%
public void remove() { zt!>
SortUtil.swap(queue,1,size--); Ia{t/IX\[
fixDown(1); ?a?4;Y!
} S~|\bnE
file://fixdown #W_-S0>&
private void fixDown(int k) { j!0-3YKv
int j; x%W~@_
while ((j = k << 1) <= size) { mr]~(]B?r
if (j < size %26amp;%26amp; queue[j] j++; l6MBnvi
if (queue[k]>queue[j]) file://不用交换 +I:/8,&-x
break; #a]\3X
SortUtil.swap(queue,j,k); \t&8J+%
k = j; 91fZr
} F<*zL:-Z
} c% ?@3d
private void fixUp(int k) { 3lS1WA
while (k > 1) { mWLiXKnb
int j = k >> 1; sYk#XNH
if (queue[j]>queue[k]) <<@F{B7h
break; .+lx}#-#
SortUtil.swap(queue,j,k); K&-uW_0
k = j; ]2@lyG#<<
} $HRl:KDdP~
} D_`~$QB`,
zqd_^
} /uXEh61$8
-Xm/sq(i)%
} 58T<~u7
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SortUtil： z: x|;Ps!
:?LUv:G
package org.rut.util.algorithm; Yv}V =O%
OQ,KQ\
import org.rut.util.algorithm.support.BubbleSort; XMt5o&U1
import org.rut.util.algorithm.support.HeapSort; dd$}FlT
import org.rut.util.algorithm.support.ImprovedMergeSort; z%$,F9/
import org.rut.util.algorithm.support.ImprovedQuickSort; lwY2zX&%)/
import org.rut.util.algorithm.support.InsertSort; U_1syaY!
import org.rut.util.algorithm.support.MergeSort; "YUh4uZ~P
import org.rut.util.algorithm.support.QuickSort; /hx|KC&:e
import org.rut.util.algorithm.support.SelectionSort; V(-=@UW
import org.rut.util.algorithm.support.ShellSort; C(t>ZR
hB]\vA7
/** ;@I4[4ph}
* @author treeroot %TOYU(k
* @since 2006-2-2 BKiyog
* @version 1.0 ukZ>_ke`+
*/ ]<9KX} B
public class SortUtil { Wmm'j&hI
public final static int INSERT = 1; m^6& !`CD
public final static int BUBBLE = 2; 1Wz -Z
public final static int SELECTION = 3; p2(U'x c
public final static int SHELL = 4; xEX"pd
public final static int QUICK = 5; v,=[!=8!
public final static int IMPROVED_QUICK = 6; M/O4JZEqh
public final static int MERGE = 7; &p."` C
public final static int IMPROVED_MERGE = 8; 4| 6<nk_
public final static int HEAP = 9; }D/O cp~o
l6YToYzE2
public static void sort(int[] data) { fV 6$YCf
sort(data, IMPROVED_QUICK); , Ww\C
} VE <p,IO
private static String[] name={ W.B>"u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 47GL[ofY
}; u]D>O$_ s
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private static Sort[] impl=new Sort[]{ Ezvm5~<
new InsertSort(), zOkIPv52~
new BubbleSort(), H[cHF
new SelectionSort(), lphELPh
new ShellSort(), \0{g~cU4
new QuickSort(), 2 /rDi
new ImprovedQuickSort(), 72YL
new MergeSort(), "*ot:;I
new ImprovedMergeSort(), yB>5p]$P
new HeapSort() H 3e(-
}; \`nRgYSE
Q|!}&=
public static String toString(int algorithm){ w<m)T
return name[algorithm-1]; APfDy
} ^KKU@ab9
qtqTLl@u
public static void sort(int[] data, int algorithm) { )_MIUQ%
impl[algorithm-1].sort(data); eHjna\C
} 't3@dz_dG
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public static interface Sort { vP_V%5~yN
public void sort(int[] data); /SXms'C
} -<R"
L\:f#b~W
public static void swap(int[] data, int i, int j) { 9PU9BYBG
int temp = data; gwf*M3(
data = data[j]; )Mtw9[
data[j] = temp; UL46%MFQ\
} 0+i\j`O&
} &WqKsH$