[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Z-|C{1}A
} \DqxS=o;
int i1=l; vI'>$
int i2=mid+1; lc-|Q#$3$
for(int cur=l;cur<=r;cur++){ Xt =bc
if(i1==mid+1) E<uOk
data[cur]=temp[i2++]; QZr<=}
else if(i2>r) 9C;Y5E~'L
data[cur]=temp[i1++]; uw=Ube(
else if(temp[i1] data[cur]=temp[i1++]; ?vFh)U
else k_>{"Rc
data[cur]=temp[i2++]; !h!9SE
} ^kvH/Y&
} MjB[5:s
>e;STU
} Jt6J'MOq
bFezTl{M
改进后的归并排序: 5V~p@vCx
A=UIN!
package org.rut.util.algorithm.support; Fz&ilB
0@lC5-=
import org.rut.util.algorithm.SortUtil; 1fv~r@6s
i[{] LiP
/** yrAzD=
* @author treeroot q-%KfZ@(|
* @since 2006-2-2 lzG;F]
* @version 1.0 `HG19_Z
*/ 4QAIQQS
public class ImprovedMergeSort implements SortUtil.Sort { k!=GNRRZE
r)(BT:2m
private static final int THRESHOLD = 10; X'7S|J6s
jHH
/* O/9%"m:i
* (non-Javadoc) WV1 Z
* |HGb.^f?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Us,[xQ
*/ JjLyV`DJ
public void sort(int[] data) { >x ghq
int[] temp=new int[data.length]; PbUcbb17
mergeSort(data,temp,0,data.length-1); @O}j:b
} sLdUrD%
~e77w\Q0
private void mergeSort(int[] data, int[] temp, int l, int r) { otf%kG w
int i, j, k; ll\^9 4]Q
int mid = (l + r) / 2; k(z<Bm
if (l == r) xg,]M/J
return; NK9WrUj)
if ((mid - l) >= THRESHOLD) =8p+-8M[d
mergeSort(data, temp, l, mid); gkML .u
else ](>7h_2B
insertSort(data, l, mid - l + 1); Xm:=jQn
if ((r - mid) > THRESHOLD) iWM7,=1+
mergeSort(data, temp, mid + 1, r); c4>sE[]
else ;[%}Xx
insertSort(data, mid + 1, r - mid); }u_EXP8M
Pgw%SMEp
for (i = l; i <= mid; i++) { RyOT[J
temp = data; b2X'AHK S
} P^3m:bE]
for (j = 1; j <= r - mid; j++) { \1mM5r~
temp[r - j + 1] = data[j + mid]; ~Oq,[,W
} &U$8zn~[k
int a = temp[l]; x56 F
int b = temp[r]; e9@fQ
for (i = l, j = r, k = l; k <= r; k++) { j%Z{.>mJ
if (a < b) { !N8)C@=
data[k] = temp[i++]; zLw h6^?Y
a = temp; 207O["Y
} else { j(6$7+2qN
data[k] = temp[j--]; _SIs19"lR
b = temp[j]; +GYMJK`S+
} G:c8`*5Q
} 8#]7`o
} )xvx6?Ah|
R^yZG{?t
/** _d[2_b1
* @param data LlA`QLe
* @param l rw8J:?0x
* @param i nN=:#4 >Y
*/ pO/SV6N
private void insertSort(int[] data, int start, int len) { vbA7I<;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x1:Pj
} kyxSIQ^
} n`m_S
} d@6:|auO
} Ukx/jNyYv
rX!+@>4_L
堆排序： t}XB|h
_7=pw5[
package org.rut.util.algorithm.support; *]m kyAhi
_)#=>$k\
import org.rut.util.algorithm.SortUtil; ~mXZfG/D
^_*jp[!`b$
/** }\`(m\2xo
* @author treeroot >9o,S3
* @since 2006-2-2 ?AV&@EX2C
* @version 1.0 bmj8WZ
*/ Ad]<e?oN=
public class HeapSort implements SortUtil.Sort{ O)R7t3t
t$]&,ucW#
/* (non-Javadoc) fa!3/X+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |D;_:x9
*/ Kk!6B
public void sort(int[] data) { O+G~Qp0b>
MaxHeap h=new MaxHeap(); |5oKq'(b
h.init(data); , @%C8Z
for(int i=0;i h.remove(); Bs+c2R
System.arraycopy(h.queue,1,data,0,data.length); H$~M`Y9I~
} ?%cn'=>ZI
qDby!^ryc
private static class MaxHeap{ oupJJDpP
o &BPG@n
void init(int[] data){ GB&Nt{
this.queue=new int[data.length+1]; Cz'xGW{
for(int i=0;i queue[++size]=data; {l0,T0
fixUp(size); jd ["eI
} ? .c?Pu
} OJMvn'y
-Bo86t)F
private int size=0; !(kX~S
KqN!?anPr
private int[] queue; (bg}an
wXc,FD$
public int get() { ;EK(b
return queue[1]; $z= 0[%L
} _FL<egK
|.1qy,|!X
public void remove() { 7<^'DOs
SortUtil.swap(queue,1,size--); ;LHDh_.pX
fixDown(1); tY{; U#9
} 0;}Aj8Fle
file://fixdown y&7YJx
private void fixDown(int k) { Xa4GqV9M/-
int j; fCLcU@3W?
while ((j = k << 1) <= size) { ppEJs
if (j < size %26amp;%26amp; queue[j] j++; j2M4H@
if (queue[k]>queue[j]) file://不用交换 dY1J<L}")
break; rqF"QU=l
SortUtil.swap(queue,j,k); YZ0en1ly
k = j; WS5A Y @(~
} d;{y`4p)s
} |Z d]=tue
private void fixUp(int k) { S0F@#mSQ?
while (k > 1) { ]5N zK=2{
int j = k >> 1; G=1m]>I8
if (queue[j]>queue[k]) dPHw3^J0j
break; UIn^_}jF`
SortUtil.swap(queue,j,k); 0Su_#".-*
k = j; [G\o+D?2
} =Ci13< KQ
} QeL{Wa-2F
z4g+2f7h-X
} w$b~x4y%
A]j}'
} |-n ('gQ[
prUHjS
SortUtil： sW?B7o?
^PC\E}
package org.rut.util.algorithm; y<|)'(
dsK/6yu
import org.rut.util.algorithm.support.BubbleSort; U,HIB^= R
import org.rut.util.algorithm.support.HeapSort; WKxm9y V
import org.rut.util.algorithm.support.ImprovedMergeSort; }C_|gd
import org.rut.util.algorithm.support.ImprovedQuickSort; qL3@PSN?|
import org.rut.util.algorithm.support.InsertSort; [%jxf\9jJ_
import org.rut.util.algorithm.support.MergeSort; YwXXXh
import org.rut.util.algorithm.support.QuickSort; d5:tSO
import org.rut.util.algorithm.support.SelectionSort; z>|)ieL
import org.rut.util.algorithm.support.ShellSort; ]%Y\ZIS
*2=W5LaK.
/** O^0"
* @author treeroot pisB,wP$2
* @since 2006-2-2 JR)/c6j
* @version 1.0 n8$=f'Hgb
*/ k-Fdj5/
public class SortUtil { y@`~9$
public final static int INSERT = 1; ;R!*I%
public final static int BUBBLE = 2; UWw}!1
public final static int SELECTION = 3; ]26mB
public final static int SHELL = 4; {`F1u?l
public final static int QUICK = 5; /[iG5~G
public final static int IMPROVED_QUICK = 6; TP{Gt.e
public final static int MERGE = 7; JOHRmfqR
public final static int IMPROVED_MERGE = 8; b_=8!Q.:
public final static int HEAP = 9; 87<9V.s2
U` hfvTi
public static void sort(int[] data) { h@@d{{IqT
sort(data, IMPROVED_QUICK); On&L#pf
} /$:U$JVb?l
private static String[] name={ "yW&<7u1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VgMP^&/gZ
}; ;v_V+t<$
`hzrfum4
private static Sort[] impl=new Sort[]{ .*!#98pT
new InsertSort(), JKy#j g:#
new BubbleSort(), q}wj}t#
new SelectionSort(), 9cfR)*Q
new ShellSort(), _]=9#Fg7{
new QuickSort(), }lP5GT2
new ImprovedQuickSort(), +j[`,5oS
new MergeSort(), ]*;F. pZ
new ImprovedMergeSort(), 7Ms90oE/c
new HeapSort() ^PqMi:htc
}; 6^E`Sa!s
TsHF tj9S
public static String toString(int algorithm){ DMd ,8W7a
return name[algorithm-1]; TJOvyz`t
} M&y5AB0
<'&F;5F3V
public static void sort(int[] data, int algorithm) { p)3nyN=|_
impl[algorithm-1].sort(data); "K?Q
} 9&K/GaG
QU/3X 1W
public static interface Sort { QaQ'OrP
public void sort(int[] data); c!Dc8=nE0m
} vv.PF~:
[U.v:tR
public static void swap(int[] data, int i, int j) { *eUc.MX6x
int temp = data; KG8W8&q
data = data[j]; IgM v =^U
data[j] = temp; >]&X ^V%Q#
} UFENy."P
} J`oTes,