[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; _"[Ls?tRX
} )=pa*
int i1=l; NOFuX9/'w
int i2=mid+1; t-Uo
for(int cur=l;cur<=r;cur++){ b} FhC"'i
if(i1==mid+1) 2#oU2si
data[cur]=temp[i2++]; Gj^*
else if(i2>r) DM,)nh6'
data[cur]=temp[i1++]; 4 (XV)QR
else if(temp[i1] data[cur]=temp[i1++]; otbr8&?-
else d9up! k
data[cur]=temp[i2++]; K5!OvqzG
} A DVUx}
} a:Nf+t
<$??Z;6
} 2N{^V?:
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改进后的归并排序: $plqk^P
#>6Jsnv1
package org.rut.util.algorithm.support; c9x&:U
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import org.rut.util.algorithm.SortUtil; ! (Q[[M
_y&XFdp
/** b]
* @author treeroot hn~btu9h
* @since 2006-2-2 _F8THYg (
* @version 1.0 n?;h-KKO:
*/ /_qHF-
public class ImprovedMergeSort implements SortUtil.Sort { }?o4MiLB
vVP.9(
private static final int THRESHOLD = 10; {Fqwr>e
W1521:
/* f `D(V-4
* (non-Javadoc) W,"Re,`H
* wJD'q\n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mx#%oJnsi
*/ r.lHlHl
public void sort(int[] data) { JfY(};&
int[] temp=new int[data.length]; f >.^7.is
mergeSort(data,temp,0,data.length-1); C1+f\A|9FP
} 8 /%{xB^
U>OAtiq JX
private void mergeSort(int[] data, int[] temp, int l, int r) { li,rPUCt
int i, j, k; I\x9xJ4x
int mid = (l + r) / 2; ANNVE},
if (l == r) G$2@N6
return; 0n'vF&E8
if ((mid - l) >= THRESHOLD) <nb%$2r1
mergeSort(data, temp, l, mid); :Nv7Wt!
else fERO(o
insertSort(data, l, mid - l + 1); jFJ}sX9]
if ((r - mid) > THRESHOLD) m"'}{3$%
mergeSort(data, temp, mid + 1, r); R7U%v"F>`
else uT'l.*W6i
insertSort(data, mid + 1, r - mid); )$1>6C\
a+cDH
for (i = l; i <= mid; i++) { ]%y>l j?Y
temp = data; T=)qD2?
} Mm(#N/
for (j = 1; j <= r - mid; j++) { 7RWgc]@?>
temp[r - j + 1] = data[j + mid]; 0Sz[u\w
} [`oVMR
int a = temp[l]; O$}.b=N9
int b = temp[r]; NPS*0y/
for (i = l, j = r, k = l; k <= r; k++) { yi*EobP
if (a < b) { b,YNCb]H
data[k] = temp[i++]; dzBP<Xyh
a = temp; A+gS'DZ9C
} else { W>i"p~!
data[k] = temp[j--]; U: Wet,
b = temp[j]; 2jC`'8
} Hcwfe=K&/
} : S3+UT
} &=BzsBh
4|E^ #C
/** xsn=Ji2 F
* @param data kI)}7e
* @param l /De~K+w7o
* @param i 8>,w8(Nt
*/ -]HZ?@
private void insertSort(int[] data, int start, int len) { ]5c(:T F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h7!O K
} L;%w{,Ji
} e5>'H!)
} xlS*9>Ij
} H{vKk
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堆排序： 7>__ fQu
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package org.rut.util.algorithm.support; jRg gj`o
O*~z@"\
import org.rut.util.algorithm.SortUtil; )6C+0b*
{h7 vJ^
/** MhD'
* @author treeroot gCb+hQq\
* @since 2006-2-2 **Ioy+
* @version 1.0 r |C.K
*/ SQ_?4 s::
public class HeapSort implements SortUtil.Sort{ .Q,"gsY
!S':G
/* (non-Javadoc) A_zCSRF,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }}=n]_f
*/ sv%X8
public void sort(int[] data) { FfJp::|ddr
MaxHeap h=new MaxHeap(); E+@Q u "W
h.init(data); Uz^N6q
for(int i=0;i h.remove(); 9efDM
System.arraycopy(h.queue,1,data,0,data.length); vPNbV
} ;\mX=S|a
5wx_ol}2
private static class MaxHeap{ yS W$zA,
0+FPAqX
void init(int[] data){ c`!e#w
this.queue=new int[data.length+1]; ?$f.[;mh
for(int i=0;i queue[++size]=data; [`\VgKeu
fixUp(size); [Km{6L&
} F?Lt-a+
} F] c\Qt
.`OU\LA
private int size=0; aj&L ZDD6
+;KUL6
private int[] queue; %} ``:
hJEd7{n
public int get() { mAW.p=;
return queue[1]; d?*]/ZiR
} 6<];}M_{
~XTC:6ts
public void remove() { Pao^>rj
SortUtil.swap(queue,1,size--); u9hd%}9Qd?
fixDown(1); ^^N|:80
} kW/G=_6
file://fixdown GTP'js
private void fixDown(int k) { BiYxI{VFD
int j; >O-KJZ'GV
while ((j = k << 1) <= size) { qIi \[Ugh
if (j < size %26amp;%26amp; queue[j] j++; A(FnU:
if (queue[k]>queue[j]) file://不用交换 d0:LJ'<Q
break; 8fXiadP#
SortUtil.swap(queue,j,k); }=-0DSLVj
k = j; FiUQ2w4
} &i5@4,p y9
} Bh3F4k2bg7
private void fixUp(int k) { _Si=Jp][
while (k > 1) { q+L'h8
int j = k >> 1; 2l<2srEK
if (queue[j]>queue[k]) _,J+b R+b
break; b#_RZ
SortUtil.swap(queue,j,k); *fg2bz<~[B
k = j; r<vMp'u
} XY"b90
} E4X6f
l f>/
} 6("_}9ZOc
/|?$C7%a\D
} f^F;`;z
jWrU'X
SortUtil： ? :H+j6+f
&QHJ%c
package org.rut.util.algorithm; (/]'e}
0kE[=#'.'
import org.rut.util.algorithm.support.BubbleSort; KQ\K:#
import org.rut.util.algorithm.support.HeapSort; q'mh*
import org.rut.util.algorithm.support.ImprovedMergeSort; 9!( 8o
import org.rut.util.algorithm.support.ImprovedQuickSort; QOWGQl%!
import org.rut.util.algorithm.support.InsertSort; c*IrZm
import org.rut.util.algorithm.support.MergeSort; mnpk9x}m
import org.rut.util.algorithm.support.QuickSort; ^DYS~I%s
import org.rut.util.algorithm.support.SelectionSort; Q %o@s3~O
import org.rut.util.algorithm.support.ShellSort; :iE b^F}
!T0I; j&
/** rFXdxRP;M
* @author treeroot "Rj PTRe:
* @since 2006-2-2 & zDuh[j}
* @version 1.0 &4?&tGi
*/ 6 U.Jaai:
public class SortUtil { (:l6R9'=
public final static int INSERT = 1; noWF0+%
public final static int BUBBLE = 2; b| L;*<KU
public final static int SELECTION = 3; EFX2>&mWo8
public final static int SHELL = 4; P $`1}
public final static int QUICK = 5; f+Y4~k
public final static int IMPROVED_QUICK = 6; tMl y*E
public final static int MERGE = 7; zhn?;Fi
public final static int IMPROVED_MERGE = 8; tYjG8P#
public final static int HEAP = 9; Sdq}?-&Sa
[> HKRVy
public static void sort(int[] data) { bn*:Bn1
sort(data, IMPROVED_QUICK); w'@gzK
} ~~>m
private static String[] name={ A]BeI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L)'G_)Sl
}; xFu ,e
{hS!IOM
private static Sort[] impl=new Sort[]{ K6v~!iiK$
new InsertSort(), KXt8IMP_"y
new BubbleSort(), Myc-lCE
new SelectionSort(), XCM!8x?K
new ShellSort(), opa/+V3E4
new QuickSort(), /zIG5RK>
new ImprovedQuickSort(), 3bRxV @0.
new MergeSort(), DGFSD Py[
new ImprovedMergeSort(), j^jC|
new HeapSort() Z`-$b~0
}; fJ}e
x;vfmgty
public static String toString(int algorithm){ 971=OEyq*
return name[algorithm-1]; alJ0gc2?
} ?_H9>/:.
dgVGP_~
public static void sort(int[] data, int algorithm) { Cd'D ~'=
impl[algorithm-1].sort(data); Qa2h#0j
} UBd+,]"f
\;7U:Y$v
public static interface Sort { P>_O :xD
public void sort(int[] data); 1Ek3^TOv7
} SQ)BS/8A
\S h/<z
public static void swap(int[] data, int i, int j) { :hICe+2ca
int temp = data; Hzz{wY
data = data[j]; TQB) A9
data[j] = temp; 5AT^puL]]
} "dpjxH=xO
} }8#olZ/(q