[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; *C*ZmC5
} n-ffX*zA(
int i1=l; uE's&H
int i2=mid+1; 4EqThvI{
for(int cur=l;cur<=r;cur++){ }93kHO{
if(i1==mid+1) C^)Imr
data[cur]=temp[i2++]; z By%=)`
else if(i2>r) ;R*-cm
data[cur]=temp[i1++]; <VxA&bb7c
else if(temp[i1] data[cur]=temp[i1++]; D^6*Cwb
else XG/xMz~
data[cur]=temp[i2++]; ^+m`mcsE
} LE8<JMB
} *kLFs|U
/L^g. ~
} b&rBWp0#
G WIsT\J
改进后的归并排序: ;b{#$#`=
]pR?/3
package org.rut.util.algorithm.support; arL>{mj
7H3v[ f^Q
import org.rut.util.algorithm.SortUtil; ]M5~p^ RB
R0-0
/** bB_LL
* @author treeroot Jp=qPG|
* @since 2006-2-2 ?J:w,,4m
* @version 1.0 <[db)r~c
*/ vywB{%p
public class ImprovedMergeSort implements SortUtil.Sort { &O'W+4FAc
s/"bH3Ob9v
private static final int THRESHOLD = 10; H a!,9{T
M/<ypJ
/* jR/Gd01)
* (non-Javadoc) w5m/[Z
* wp?:@XM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kd'b_D[$H
*/ xk,Uf,,>
public void sort(int[] data) { x4q}xwH
int[] temp=new int[data.length]; # ?2*I2_
mergeSort(data,temp,0,data.length-1); ]Fy'M
} ly%^\jW
o,rF15
private void mergeSort(int[] data, int[] temp, int l, int r) { KR?;7*qF
int i, j, k; !PA:#]J
int mid = (l + r) / 2; 6F(z6_<
if (l == r) 0>|q[SC
return; ^EUR#~b5iy
if ((mid - l) >= THRESHOLD) MLdwf}[
mergeSort(data, temp, l, mid); wsQnjT>
else qf0pi&q
insertSort(data, l, mid - l + 1); Nh!`"B2B
if ((r - mid) > THRESHOLD) X?_rD'3
mergeSort(data, temp, mid + 1, r); WzzA:X
else ew1L+
insertSort(data, mid + 1, r - mid); 5eTA]
bgzd($)u
for (i = l; i <= mid; i++) { y<Koc>8
temp = data; KtQs uL%
} IO\1nB$0nb
for (j = 1; j <= r - mid; j++) { N'2?Zb
temp[r - j + 1] = data[j + mid]; J||g(+H>
} HJl?@&l/
int a = temp[l]; 5sY$
int b = temp[r]; ]KFh1
for (i = l, j = r, k = l; k <= r; k++) { [5P-K{Ko
if (a < b) { hY4#4A`I
data[k] = temp[i++]; wC{sP"D
a = temp; Lvf<g}?4
} else { Z[@ i/. I
data[k] = temp[j--]; t utk*|S
b = temp[j]; e1Db +QBV
} e4YfJd
} @D9O<x
} p cLKE ZK
31G:[;g
/** +~"IF+TRH
* @param data Exwd,2>
* @param l JO|j?%6YY
* @param i 6(E4l5%
*/ )la3GT*1mS
private void insertSort(int[] data, int start, int len) { RE t&QP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x]7:MG$
} :BxO6@>Xc
} H1-DK+Q:
} BwHJr(n
} )9Q+07
,kJ'_mq
堆排序： ,l&?%H9q
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package org.rut.util.algorithm.support; s,_+5ukv
K28L(4)
import org.rut.util.algorithm.SortUtil; %B@NW2ZQ[
.F ?ww}2p]
/** /gu VA
* @author treeroot ?xaUWD
* @since 2006-2-2 ;2kQ)Bq"
* @version 1.0 2VV>?s
*/ 6/;YS[jX
public class HeapSort implements SortUtil.Sort{ >v,X:B?+FL
L\4rvZa
/* (non-Javadoc) hlVC+%8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U4d7-&U
*/ 5]i#l3")
public void sort(int[] data) { =o(}=T>:"
MaxHeap h=new MaxHeap(); m}yu4
h.init(data); Ny"9!3V
for(int i=0;i h.remove(); R6<'J?k
System.arraycopy(h.queue,1,data,0,data.length); ( %7V
} ?,VpZ%Df2
B>i%:[-e
private static class MaxHeap{ ]:f.="
7T[L5-g
void init(int[] data){ +vZYuEq_
this.queue=new int[data.length+1]; M.H!dZ
for(int i=0;i queue[++size]=data; @6ckB (
fixUp(size); z_(l]Ern}
} :+YHj)mN
} N)(m^M(~0
*l d)nH{
private int size=0; *c#DB{N
D0#U*tq;
private int[] queue; m&AbH&;
ok--Jyhv#
public int get() { l4kqz.Z-g
return queue[1]; y6am(ugE
} _U*R_2aV
di_N}x*
public void remove() { N_D=j6B
SortUtil.swap(queue,1,size--); 23LG)or.JC
fixDown(1); >%"TrAt
} e`+
file://fixdown !T`g\za/
private void fixDown(int k) { >$}Mr%49
int j; k&yBB%g
while ((j = k << 1) <= size) { q|YnNk>1
if (j < size %26amp;%26amp; queue[j] j++; `mkOjsj &
if (queue[k]>queue[j]) file://不用交换 heF'7ezv#
break; 4-O.i\1q
SortUtil.swap(queue,j,k); uYTyR;a
k = j; lxTqGwx
} s,J\nbj0h
} _u-tRHh|A
private void fixUp(int k) { #5;4O{
while (k > 1) { 5UL5C:3R9
int j = k >> 1; !OV+2suu1
if (queue[j]>queue[k]) 3Mh_&%!O
break; +L?;g pVE&
SortUtil.swap(queue,j,k); ;|rFP
k = j; 5'Mw{`
} Md:*[]<~
} }8.$)&O$^
}2y"F@{T
} o) eW5s,6
R{4[.
} PClwGO8'&
4>=Y@z
SortUtil： H_JT"~_2
0} \;R5a<
package org.rut.util.algorithm; ^YPw'cZZ&
0/+TQD!L
import org.rut.util.algorithm.support.BubbleSort; arPqVMVr
import org.rut.util.algorithm.support.HeapSort; ^oHK.x#{
import org.rut.util.algorithm.support.ImprovedMergeSort; p'SY 2xq-,
import org.rut.util.algorithm.support.ImprovedQuickSort; BGB.SN#q+
import org.rut.util.algorithm.support.InsertSort; T7G{)wm
import org.rut.util.algorithm.support.MergeSort; MM+nE_9lV
import org.rut.util.algorithm.support.QuickSort; +DT)7koA
import org.rut.util.algorithm.support.SelectionSort; =WOYZ7
import org.rut.util.algorithm.support.ShellSort; >>7m'-k%D
l&Fx< W
/** n@e|PWu
* @author treeroot VN4H+9E
* @since 2006-2-2 YsjTC$Tx,
* @version 1.0 M\9p-%"L
*/ FCr>$
public class SortUtil { z2V_nkI
public final static int INSERT = 1; bO{wQ1)Z_
public final static int BUBBLE = 2; [=xO>
public final static int SELECTION = 3; i3y>@$fRL\
public final static int SHELL = 4; Z"<tEOs/En
public final static int QUICK = 5; | \JB/x
public final static int IMPROVED_QUICK = 6; ;lb@o,R :
public final static int MERGE = 7; T*C]:=)
public final static int IMPROVED_MERGE = 8; i%_nH"h
public final static int HEAP = 9; Hb *&&
T%:W6fH7
public static void sort(int[] data) { \xaK?_hv
sort(data, IMPROVED_QUICK); 3>sA_
} C}GOwvAL>
private static String[] name={ xBcE>^{1.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bjJ212J
}; bc|DC,n?
*e05{C:kS
private static Sort[] impl=new Sort[]{ 6ax|EMw
new InsertSort(), ]q@6&]9
new BubbleSort(), Hlq#X:DCn
new SelectionSort(), JuT~~Z
new ShellSort(), D@>^_cTO24
new QuickSort(), F\;G'dm
new ImprovedQuickSort(), 5zF7yvS.w
new MergeSort(), j!P]xl0vOZ
new ImprovedMergeSort(), sk_Q\0a
new HeapSort() e'z[JG=
}; uD''0G\
*G#W],~0
public static String toString(int algorithm){ v5GV"qY
return name[algorithm-1]; u>.qhtm[
} x-/`c
/_P5UE(
public static void sort(int[] data, int algorithm) { bEE'50D
impl[algorithm-1].sort(data); XaV h.
} Q_F8u!qrZ
+mN]VO*y
public static interface Sort { IOsitMOX:
public void sort(int[] data); gG^K\+S
} n LZ
$!x8XpR8s
public static void swap(int[] data, int i, int j) { gI qYIt
int temp = data; N(W;(7
data = data[j]; q]Cmaf(
data[j] = temp; io$!z=W
} S&% GB
} kmm1b (