[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; 1f3c3PJ
} [)efh9P*
int i1=l; S($8_u$U
int i2=mid+1; Oy(fh%k#
for(int cur=l;cur<=r;cur++){ Jd]kg,/
if(i1==mid+1) eyM<#3\\S
data[cur]=temp[i2++]; /x2-$a:<
else if(i2>r) =&%}p[ 3g
data[cur]=temp[i1++]; V47z;oMXct
else if(temp[i1] data[cur]=temp[i1++]; TH[xSg
else AW{"9f4
data[cur]=temp[i2++]; .wH`9aq;5@
} <'y}y}%
} rdQKzJiX=U
P8&BtA
} hQWo ]WF(J
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改进后的归并排序: azK7kM~
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package org.rut.util.algorithm.support; =6.4
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import org.rut.util.algorithm.SortUtil; T`ofj7$:
G 6r2 "
/** j\hI, mc
* @author treeroot d76nyQKK
* @since 2006-2-2 a:v5(@8
* @version 1.0 LE@<)}Au^
*/ QUQw/
public class ImprovedMergeSort implements SortUtil.Sort { Am'%tw ~
M6nQ17\{
private static final int THRESHOLD = 10; `[)!4Jb
_^%DfMP3i\
/* -- >q=hlA
* (non-Javadoc) T]_]{%z
* "26=@Q^Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R$|"eb5
*/ 5&C:&=Y
public void sort(int[] data) { m%ec=%L9
int[] temp=new int[data.length]; !B*l'OJw
mergeSort(data,temp,0,data.length-1); +nAbcBJAl
} 4*U5o!w1{
e 48N[p
private void mergeSort(int[] data, int[] temp, int l, int r) { R:+cumHr
int i, j, k; Be$v%4
int mid = (l + r) / 2; rv?4S`Z,x$
if (l == r) 3< 'bi}{
return; 1m~-q4D)V
if ((mid - l) >= THRESHOLD) W9D~:>^YP
mergeSort(data, temp, l, mid); <5 )F9.$
else M*gbA5
insertSort(data, l, mid - l + 1); ln1!%B;
if ((r - mid) > THRESHOLD) v\Y8+dD
mergeSort(data, temp, mid + 1, r); zJ*(G_H
else {*PbD;/f
insertSort(data, mid + 1, r - mid); WGwIc7
1IPRI<1U
for (i = l; i <= mid; i++) { f1$'av
temp = data; <9dfbI)
} YB}m1g`
for (j = 1; j <= r - mid; j++) { 4{lrtNd~K
temp[r - j + 1] = data[j + mid]; ^TZ`1:oL#
} ;Yve m
int a = temp[l]; +HT?>k
int b = temp[r]; H$ZLtPv5
for (i = l, j = r, k = l; k <= r; k++) { 91#rP|88;
if (a < b) { ;5p;i8m
data[k] = temp[i++]; wJc`^gj
a = temp; :.P{}\/
} else { @ogj -ol&
data[k] = temp[j--]; }&LVD$Bz
b = temp[j]; R>D[I.
} R wTzS;
} <kCOg8<y :
} @P)2ZGG
Di"Tv<RlQ
/** "wR1=&gk
* @param data 8l l}"
* @param l e>2KW5.
* @param i (O$il
*/ eH]9"^> o
private void insertSort(int[] data, int start, int len) { at+Nd K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]iYO}JuX
} o~{rZ~
} ' ~1/*F%8
} nv<t$r
} .% 79(r^
^WkqRs
堆排序： nB;[;dCz
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package org.rut.util.algorithm.support; 9e*o$)j_
m-2!r*(zt
import org.rut.util.algorithm.SortUtil; nX_w F`n"
8ZF!}kb0F
/** JT! Cb$!
* @author treeroot ~p`[z~|
* @since 2006-2-2 |ju+{+
* @version 1.0 <Uy $b4h
*/ M%YxhuT0
public class HeapSort implements SortUtil.Sort{ eiQ42x@Z
YB1Jv[
/* (non-Javadoc) 4:=VHd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hTQ8y10a
*/ (?xR<]~g*
public void sort(int[] data) { y8ODoXk
MaxHeap h=new MaxHeap(); ,R\ex =c
h.init(data); N*f]NCSi
for(int i=0;i h.remove(); w\RYxu?
System.arraycopy(h.queue,1,data,0,data.length); P=aYwmC
} TbD $lx3>
. {vMn0c
private static class MaxHeap{ A*~BkvPr
j+PLtE
void init(int[] data){ PA*1]i#2M=
this.queue=new int[data.length+1]; 7_R[=t
for(int i=0;i queue[++size]=data; ?3%r:g4
fixUp(size); y>X(GF^
} Px3I+VP
} <@$+uZt+
Ss3~X90!*B
private int size=0; 3Rhoul[S
+NJIi@
private int[] queue; >0UY,2d
9PUobV_^Wo
public int get() { mT/^F{c
return queue[1]; )3WUyD*UZN
} }9 ]7V<
:PK2! 0nK
public void remove() { "A*;V
SortUtil.swap(queue,1,size--); {"2Hv;x
fixDown(1); <TTBIXV
} EbeSl+iMx_
file://fixdown DX^8w?t
private void fixDown(int k) { 3+\Zom4
int j; Z*b$&nM
while ((j = k << 1) <= size) { <G0Ut6J>
if (j < size %26amp;%26amp; queue[j] j++; Z2 Vri
if (queue[k]>queue[j]) file://不用交换 `An p;el
break; !+z&] S3s
SortUtil.swap(queue,j,k); D~FIv
k = j; Y>T<Qn^D
} ::_bEmk
} J/QqwoR
private void fixUp(int k) { ($Op*bR
while (k > 1) { e)y+]
int j = k >> 1; /#z"c]#
if (queue[j]>queue[k]) C[';B)a
break; ,vo]WIQ\:
SortUtil.swap(queue,j,k); bk1.H@8
k = j; yFn~rv|&G
} ILx4[m7
} )%b 5uZ
Vry*=X&Q
} 2r!- zEV
qnb/zr)p
} hE E1i
oJ tmd}
SortUtil： ;<*%BtD?
jrxq558
package org.rut.util.algorithm; 1>/ iYf
Qp7F3,/#
import org.rut.util.algorithm.support.BubbleSort; YCVT0d
import org.rut.util.algorithm.support.HeapSort; <(_Tanx9Q
import org.rut.util.algorithm.support.ImprovedMergeSort; {6O}E9
import org.rut.util.algorithm.support.ImprovedQuickSort; P @J)S ?
import org.rut.util.algorithm.support.InsertSort; ~xv3R
import org.rut.util.algorithm.support.MergeSort; K%W;-W*'
import org.rut.util.algorithm.support.QuickSort; zf]e"e
import org.rut.util.algorithm.support.SelectionSort; (w#)|9Cxm
import org.rut.util.algorithm.support.ShellSort; 4 aE{}jp1
M(yWE0 3
/** &^w"
* @author treeroot m?gGFxo
* @since 2006-2-2 YS@TQ?
* @version 1.0 j;qV+Rq]t
*/ ;<GK{8
public class SortUtil { *7=`]w5k1
public final static int INSERT = 1; PJ=|g7I
public final static int BUBBLE = 2; c^cr_i
public final static int SELECTION = 3; `Z#':0Z
public final static int SHELL = 4; /MMnW$)
public final static int QUICK = 5; #C'E'g0
public final static int IMPROVED_QUICK = 6; *VHWvj
public final static int MERGE = 7; pN_%>v"o
public final static int IMPROVED_MERGE = 8; Pe-rwM
public final static int HEAP = 9; 8_ascvs5
O)DAYBv^
public static void sort(int[] data) { _;%l~q/
sort(data, IMPROVED_QUICK); x}O,xquY
} R+t]]n6#
private static String[] name={ `mI5Z*]-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8GRB6-.h
}; H}lz_#Z
Tm9sQ7Oj(
private static Sort[] impl=new Sort[]{ ?`xm_udc
new InsertSort(), zk!7TUZ">w
new BubbleSort(), %"=GQ3u[
new SelectionSort(), i`Qa7
new ShellSort(), 9~$E+m(
new QuickSort(), ;q5|If
new ImprovedQuickSort(), H|7XfM
new MergeSort(), azNv(|eeJL
new ImprovedMergeSort(), *wsZ aQ
new HeapSort() 4<vi@,s
}; I(WIT=Wi<
j6};K ~N`
public static String toString(int algorithm){ $RB p!7
return name[algorithm-1]; @nMVs6
} 2s>BNWTU
^7*7^<
public static void sort(int[] data, int algorithm) { MslgQmlM
impl[algorithm-1].sort(data); Q, "8Ty
} 9ZG:2ncdJ
lFduX D
public static interface Sort { xX9snSGz
public void sort(int[] data); dz>Jl},`k
} X 5X D1[
H:9G/Nev
public static void swap(int[] data, int i, int j) { S{v]B_N[M
int temp = data; RnU7|p{
data = data[j]; [clwmx
data[j] = temp; A|]#b?-
} 'x<oILOG
} eMdf[eS