[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; N0h"EV[
} q#-szZQ
int i1=l; R ;^[4<&
int i2=mid+1; R/M:~h~F!
for(int cur=l;cur<=r;cur++){ twqjaFA>
if(i1==mid+1) BlS0I%SN
data[cur]=temp[i2++]; nn"!x|c
else if(i2>r) AA9OElCa
data[cur]=temp[i1++]; :2?J#/o
else if(temp[i1] data[cur]=temp[i1++]; <L@0w8i`
else v6 DN:!&
data[cur]=temp[i2++]; `!HGM>
} LMWcF'l
} 9}Tf9>qP>M
,ijgqEN
} W$@q ~/E
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改进后的归并排序: _JA.~edqM
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package org.rut.util.algorithm.support; |<\LB
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import org.rut.util.algorithm.SortUtil; gEtDqq~y@
"xlf6pm%
/** *TA${$K
* @author treeroot !mrB+<:
* @since 2006-2-2 N\Bygjw|
* @version 1.0 o;mXk2
*/ Zgo^M,g
public class ImprovedMergeSort implements SortUtil.Sort { JY#IeNL
vbmSbZ"y
private static final int THRESHOLD = 10; fR}|CP
LWc}j`Wd
/* _r5Q%8J
* (non-Javadoc) Gd`qZqx#
* )JTh=w4n|z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nI%0u<=d
*/ ;Br8\2=$
public void sort(int[] data) { {j[[E/8N!y
int[] temp=new int[data.length]; g.X?wyg5
mergeSort(data,temp,0,data.length-1); =Z iyT$p
} ;g: TsYwM
za'Eom-<u
private void mergeSort(int[] data, int[] temp, int l, int r) { 7rc^-!k
int i, j, k; dfGdY"&
int mid = (l + r) / 2; zTBr<:
if (l == r) <DiD8")4
return; N VzR2
if ((mid - l) >= THRESHOLD) e~c;wP~cO
mergeSort(data, temp, l, mid); v I@Wuu:
else ?7^H1L
insertSort(data, l, mid - l + 1); %xf6U>T
if ((r - mid) > THRESHOLD) ^<$dTr'
mergeSort(data, temp, mid + 1, r); ,IxAt&kN
else q"'^W<i
insertSort(data, mid + 1, r - mid); zuWj@YG\.
xj)*K%re
for (i = l; i <= mid; i++) { ,:G.V
temp = data; 3k5OYUk
} "8J$7g@n@
for (j = 1; j <= r - mid; j++) { |X`xJL
temp[r - j + 1] = data[j + mid]; :#"gQ^YNp
} /}r%DND'
int a = temp[l]; =;0#F&
int b = temp[r]; s%>>E!Qi_
for (i = l, j = r, k = l; k <= r; k++) { T.GY
if (a < b) { M5HKRLt
data[k] = temp[i++]; *f$mSI=
a = temp; f GE+DjeA
} else { Y.3]vno?X
data[k] = temp[j--]; Wu<
b = temp[j]; 97e fWYj
} B%Dy;zdWd/
} lz EF^6I
} $:s1x\ol
u}D.yI8
/** bQow,vf
* @param data ?3kfhR
* @param l K5z*DYT
* @param i y. @7aT5
*/ (EIdw\
private void insertSort(int[] data, int start, int len) { 9`i=kp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s<H0ka@
} K& <|94_k
} ]y@9z b
} L{ ?& .iA
} kYl$V=
mfQQ<Q@
堆排序： 2I(0EBW
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package org.rut.util.algorithm.support; -RVwPY
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import org.rut.util.algorithm.SortUtil; ;FQAL@"Yj
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/** 9 bYoWw
* @author treeroot *TVr| to
* @since 2006-2-2 '0GCaL*Sd
* @version 1.0 pvQw+jX
*/ u1/4WYJeJ
public class HeapSort implements SortUtil.Sort{ :h=];^/E
2)h i(
/* (non-Javadoc) &Hb6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *L%HH@] %_
*/ F(^vD_G
public void sort(int[] data) { oqB(l[%z2
MaxHeap h=new MaxHeap(); JGX E{FT
h.init(data); $`.7XD}
for(int i=0;i h.remove(); DbP!wU lqR
System.arraycopy(h.queue,1,data,0,data.length); mEv<r6qDT
} VmHok
N\l\ M
private static class MaxHeap{ _N$3c<dY'
z 3fS+x:E{
void init(int[] data){ .slA}
this.queue=new int[data.length+1]; c<wsWs 4V
for(int i=0;i queue[++size]=data; r#JE7uneT
fixUp(size); )9 5&-Hs
} {'E%SIRZ)
} 8]]uk=P
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private int size=0; xmb]L:4F
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private int[] queue; v*<hE>J0
Mg W0 ).
public int get() { (BEGt'7
return queue[1]; O&V}T#8n
} O;9u1,%w
*?Nrx=O*
public void remove() { MzL^u8
SortUtil.swap(queue,1,size--); |)* K#%j
fixDown(1); f)l:^/WP+
} 8s-y+M@.
file://fixdown msM
private void fixDown(int k) { "6 |j 0?Q
int j; d }=fJ
while ((j = k << 1) <= size) { *%7[{Loz
if (j < size %26amp;%26amp; queue[j] j++; P{i\x#
if (queue[k]>queue[j]) file://不用交换 XxcY
break; !qS~YA
SortUtil.swap(queue,j,k); pYa8iQ`6U;
k = j; [^$nt
} 5,})x]'x
} ^.p({6H
private void fixUp(int k) { .LhIB?
while (k > 1) { u)Y~+ [Q
int j = k >> 1; O`Er*-O
if (queue[j]>queue[k]) :f G5?])
break; LQ`s>q
SortUtil.swap(queue,j,k); #(F/P!qk
k = j; 4='Xhm
} t'|A0r$
} dIg/g~ t"
jzI70+E
} >!848J
rn $a)^!
} y<0zAsT
?;zu>4f|
SortUtil： a\>+!Vq
n/6#rj^$
package org.rut.util.algorithm; NY 756B*
Y<-h#_
import org.rut.util.algorithm.support.BubbleSort; FeoI+KA
import org.rut.util.algorithm.support.HeapSort; jj_z#6{
import org.rut.util.algorithm.support.ImprovedMergeSort; *`Swv`
import org.rut.util.algorithm.support.ImprovedQuickSort; 4l7TrCB
import org.rut.util.algorithm.support.InsertSort; bc=,$
import org.rut.util.algorithm.support.MergeSort; g5M=$y/H
import org.rut.util.algorithm.support.QuickSort; \@;$xdA$
import org.rut.util.algorithm.support.SelectionSort; 45. -P
import org.rut.util.algorithm.support.ShellSort; v_mk{
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/** G d~ v _
* @author treeroot %c"PMTq(
* @since 2006-2-2 pFgpAxl
* @version 1.0 "BT*9N=|
*/ _HF66)X7
public class SortUtil { s!,m,l[P
public final static int INSERT = 1; CX?q%o2b
public final static int BUBBLE = 2; 39to5s,
public final static int SELECTION = 3; 6D|[3rXr
public final static int SHELL = 4; 1/+d@s#t
public final static int QUICK = 5; 9uR+
public final static int IMPROVED_QUICK = 6; hb#Nm6
public final static int MERGE = 7; LvtHWt
public final static int IMPROVED_MERGE = 8; U{i xok
public final static int HEAP = 9; Wip@MGtJ
E! d?@Xr@
public static void sort(int[] data) { q\s"B.(G"
sort(data, IMPROVED_QUICK); 2 j.6
} :No`+X[Kq
private static String[] name={ DmU,}]#:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >RJjm&M
}; 7irpD7P>
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private static Sort[] impl=new Sort[]{ H3-(.l[!b)
new InsertSort(), ^Ej$o@PH
new BubbleSort(), jq%%|J.x
new SelectionSort(), %"-bG'Yc
new ShellSort(), <G|i!Pm
new QuickSort(), j5m KJC
new ImprovedQuickSort(), !q\MXS($#u
new MergeSort(), ]QKo>7%[
new ImprovedMergeSort(), YBh|\
new HeapSort() )U12Rshl
}; >[}lC7 z,
R !g'zS'
public static String toString(int algorithm){ GWFF.Mo^
return name[algorithm-1]; yq.<,b=87
} f~Y;ZvB
4`yE'%6.}
public static void sort(int[] data, int algorithm) { ezimQ
impl[algorithm-1].sort(data); !Gob `# r
} ]1hyvm3
qm^|7m^
public static interface Sort { O6*2oUKqK
public void sort(int[] data); 8;6j
} GuK3EM*_
P5Lb)9_Jw
public static void swap(int[] data, int i, int j) { Zt_~Zxn3
int temp = data; (4o<U%3kGq
data = data[j]; &!P' M
data[j] = temp; X*cDn.(I
} 6/Iq@BZ&
} E{;F4wT_@