[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; 3$#=*Zp
} loByT p ^
int i1=l; .Z#8,<+
int i2=mid+1; yM`QVO!;
for(int cur=l;cur<=r;cur++){ -S6^D/(;
if(i1==mid+1) 0\DlzIO
data[cur]=temp[i2++]; 37U$9]
else if(i2>r) .EXxNB]%Y&
data[cur]=temp[i1++]; "(NJ{J#A
else if(temp[i1] data[cur]=temp[i1++]; <)4>"SN&^
else *3s,~<''%
data[cur]=temp[i2++]; Cz)/Bq
} ll#_v^
} h#?)H7ft
G$7!/O%#_
} 5y8ajae:
e00s*LdC
改进后的归并排序: gg+!e#-X
DMpNmF>
package org.rut.util.algorithm.support; FXO{i:Zo
kgGMA 7Jy
import org.rut.util.algorithm.SortUtil; t}m"rMbt
@S#Ls="G
/** wVac6q
* @author treeroot QKt+Orz
* @since 2006-2-2 =Dc9|WuHN
* @version 1.0 C[2LP$6*/
*/ 1yT\|2ARZ%
public class ImprovedMergeSort implements SortUtil.Sort { I>n2# -8
hutdw>
private static final int THRESHOLD = 10; hY}.2
a&)4Dv0
/* s{@3G8
* (non-Javadoc) ^^+vt8|
* =CGB}qU l0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) em,j>qp
*/ n\'@]qG)Z4
public void sort(int[] data) { whb,2=gIE
int[] temp=new int[data.length]; csCi0'u
mergeSort(data,temp,0,data.length-1); .~jn N
} p5?8E$VHV
r]yI5 ;
private void mergeSort(int[] data, int[] temp, int l, int r) { 6eq`/~#
int i, j, k; z>9gt
int mid = (l + r) / 2; jQRl-[n
if (l == r) NoD\t(@h
return; ;{S7bH'6m
if ((mid - l) >= THRESHOLD) m[E#$JZtG
mergeSort(data, temp, l, mid); jdW#; ]7+y
else yr,Oq~e
insertSort(data, l, mid - l + 1); \rPT7\ZA
if ((r - mid) > THRESHOLD) _^Yav.A=
mergeSort(data, temp, mid + 1, r); y - Ge"mY
else vm4q1!!(
insertSort(data, mid + 1, r - mid); \h UE,^
; w+<yW}EL
for (i = l; i <= mid; i++) { ^eHf'^Cvvu
temp = data; S1G=hgF_L
} OYwH$5
for (j = 1; j <= r - mid; j++) { ns;nle|m
temp[r - j + 1] = data[j + mid]; IP-}J$$1
} jSMs<ox
int a = temp[l]; [X=J]e^D
int b = temp[r]; @ 9q/jv`
for (i = l, j = r, k = l; k <= r; k++) { q@8j[15
if (a < b) { Yt#e[CYnu
data[k] = temp[i++]; 81&5g'
a = temp; r5(-c]E7
} else { [2Rw)!N
data[k] = temp[j--]; xGVL|/?8
b = temp[j]; ^Z~'>J
} [/Ya4=C@
} _?J:Z*z?
} oMer+=vH
x"xtILrI
/** Sh2;^6d
* @param data J2P5<
* @param l bWOn`#+&
* @param i E])X$:P?
*/ WTZr{)e
private void insertSort(int[] data, int start, int len) { }2i3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N,Ys}qP
} "H!2{l{
} o;<oXv
} MF%>avRj
} wD'LX
SYZS@o
堆排序： 6yRxb(
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package org.rut.util.algorithm.support; Tx!c}
i[x;k;m2q
import org.rut.util.algorithm.SortUtil; i~04P
km+}./@
/** Ls~F4ar$/
* @author treeroot EPMdR66
* @since 2006-2-2 oN/T>&d
* @version 1.0 8E9W\@\
*/ 2(Ez H
public class HeapSort implements SortUtil.Sort{ \JX.)&> -
I_/kJ#7vj
/* (non-Javadoc) 3[E)/~-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) //\UthOT
*/ &:ib>EB03=
public void sort(int[] data) { |Y42ZOK0
MaxHeap h=new MaxHeap(); #H1ng<QV
h.init(data); %`Q<_LTU
for(int i=0;i h.remove(); -A A='s
System.arraycopy(h.queue,1,data,0,data.length); Axtf,x+lH
} ,0=@cJ
m+Bt9|d
private static class MaxHeap{ gbJz5EEq
}\oy?_8~
void init(int[] data){ {V)Z!D
this.queue=new int[data.length+1]; ctg[C$<q|
for(int i=0;i queue[++size]=data; pdQ6/vh
fixUp(size); 3#@ETt0X(
} &bO0Rn1F
} xo46L\
nS}XY
private int size=0; HBc^[fJ^-
8}0O @ wq
private int[] queue; aykNH>#Po
m+J3t@$
public int get() { 8>sToNRNe
return queue[1]; BEv>?T 0
} 8yDu(.Q
1Lf:TQB
public void remove() { =os%22*
SortUtil.swap(queue,1,size--); UEvRK?mm=
fixDown(1); 9V%s1@K
} Ba],ONM4k
file://fixdown *CH lg1
private void fixDown(int k) { <Eo;CaaF/
int j; _e;$Y#`EO
while ((j = k << 1) <= size) { z$d/Vz,a
if (j < size %26amp;%26amp; queue[j] j++; ,\FJVS;NeJ
if (queue[k]>queue[j]) file://不用交换 B0^0d*8t|@
break; B0KZdBRx}
SortUtil.swap(queue,j,k); mt+IB4`
k = j; 0O,l rF0'
} 4ZK8Y[]Lv
} wM;9plYlw0
private void fixUp(int k) { 7O)U(<70
while (k > 1) { 5$e|@/(0
int j = k >> 1; s C9j73vf
if (queue[j]>queue[k]) .cQ<F4)!tu
break; [Pu~kiN
SortUtil.swap(queue,j,k); H?P:;1A]c
k = j; CjtXU=}A
} /8GgEW9Q~G
} IR+dGqIjZb
>!OD[9
} XZv(B^
~7W?W<
} IQS:tL/
T>&d/$;]
SortUtil： wnL\.%Y^
0wLu*K5$4E
package org.rut.util.algorithm; d (Fb_
?dukK3u
import org.rut.util.algorithm.support.BubbleSort; TvE M{
import org.rut.util.algorithm.support.HeapSort; >C`b4xQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 1A4!zqT;
import org.rut.util.algorithm.support.ImprovedQuickSort; XF{ g~M
import org.rut.util.algorithm.support.InsertSort; Xz'pZ*Hr$v
import org.rut.util.algorithm.support.MergeSort; ?Mg&e/^
import org.rut.util.algorithm.support.QuickSort; ()Z!u%j
import org.rut.util.algorithm.support.SelectionSort; J>YwMl
import org.rut.util.algorithm.support.ShellSort; !79^M
wjF/c
/** h7NS9CgO
* @author treeroot jB*%nB*x
* @since 2006-2-2 ZkW,
* @version 1.0 ^G+1nY4?J
*/ x?:[:Hf
public class SortUtil { }jM&GH1
public final static int INSERT = 1; /#z5bo
public final static int BUBBLE = 2; G SXe=?
public final static int SELECTION = 3; /RuGh8qzP
public final static int SHELL = 4; iK$)Iy0
public final static int QUICK = 5; 'b#`8k~>
public final static int IMPROVED_QUICK = 6; ysV0Ed
public final static int MERGE = 7; &+\J "V8
public final static int IMPROVED_MERGE = 8; yVvO!
public final static int HEAP = 9; [a;U'v*
J~6+zBF
public static void sort(int[] data) { OAMsqeWYA
sort(data, IMPROVED_QUICK); + RX{
} TKpka]nJ
private static String[] name={ njveZav
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r^mP'#
}; A@BYd'}]
)oJn@82C|
private static Sort[] impl=new Sort[]{ L'LZK
new InsertSort(), $9DV}
new BubbleSort(), sv0)sL
new SelectionSort(), c(.2D
new ShellSort(), wRn]
new QuickSort(), [];*9vxW
new ImprovedQuickSort(), ab!,)^
new MergeSort(), ?GPTJ#=j=]
new ImprovedMergeSort(), CpuL[|51
new HeapSort() t<M^/xe2
}; V,<3uQD9a
#1i&!et&/
public static String toString(int algorithm){ C9[Jr)QX
return name[algorithm-1]; Xm./XC
} PG<tic<?
[R[]&\W
public static void sort(int[] data, int algorithm) { -t_t3aU|
impl[algorithm-1].sort(data); Ah,X?0+
} GsG.9nd
!rzbm&@
public static interface Sort { 79|=y7i#
public void sort(int[] data); :c@v_J6C&
} rmS.$h@7 m
n`Pwo&
public static void swap(int[] data, int i, int j) { HV-c DL
int temp = data; =*7K_M&
data = data[j]; {<{ O!
data[j] = temp; !63p?Q=
} 7U>Xi'?
} tLXwszR0r