[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; i<T`]g
} H1@"Yg8
int i1=l; k{;:KW|
int i2=mid+1; 44]ae~@a
for(int cur=l;cur<=r;cur++){ zZy>XHR H
if(i1==mid+1) $~2Ao[
data[cur]=temp[i2++]; E>[~"~x"pV
else if(i2>r) *R:nB)(6<
data[cur]=temp[i1++]; 5|/vc*m_0'
else if(temp[i1] data[cur]=temp[i1++]; :1s1wY3Y
else /)G9w]|T
data[cur]=temp[i2++]; 1HZexV
} .!`j3W]
} ,rN7X<s54
]F_u
} S !e0:
]f\rB8k|&
改进后的归并排序: k82'gJ;MC=
n2QD*3i
package org.rut.util.algorithm.support; H#ihU3q
'dg OE
import org.rut.util.algorithm.SortUtil; 6-^+btl)#
"3v%|
/** VOiphw`
* @author treeroot Zw3|HV(so
* @since 2006-2-2 {k)MC)%
* @version 1.0 U9If%0P
*/ @GEvI2Vf.0
public class ImprovedMergeSort implements SortUtil.Sort { N0XGW_f
(2{1m#o
private static final int THRESHOLD = 10; ffWvrY;j[
N$3F4b%+
/* %AJdtJ@0H
* (non-Javadoc) FkS{Z s
* }skXh_Vu4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) leiza?[
*/ ~p8!Kb6
public void sort(int[] data) { O 8fh'6
int[] temp=new int[data.length]; B>'\g O\2
mergeSort(data,temp,0,data.length-1); `aUA_"f
} @B[V'|
ik]UzB
private void mergeSort(int[] data, int[] temp, int l, int r) { 5n"'M&Ce
int i, j, k; -V+fQGZe
int mid = (l + r) / 2; ;<*VwXJR
if (l == r) f{vnZ|WD
return; \t(/I=E8/
if ((mid - l) >= THRESHOLD) 4v{gc/g
mergeSort(data, temp, l, mid); t &ucqY
else ^yfT7050
insertSort(data, l, mid - l + 1); ](O!6_'d
if ((r - mid) > THRESHOLD) 0 8U:{LL
mergeSort(data, temp, mid + 1, r); 7<) .luV
else cBAA32wf
insertSort(data, mid + 1, r - mid); m3,v&Z
6Y=$7%z
for (i = l; i <= mid; i++) { ycH=L8
temp = data; KUp lN1Sy
} K4 >d
for (j = 1; j <= r - mid; j++) { SAqX[c
temp[r - j + 1] = data[j + mid]; PeG8_X}u9
} >97V2W
int a = temp[l]; {:"bX~<^
int b = temp[r]; d) > if<o
for (i = l, j = r, k = l; k <= r; k++) { tV T(!&(
if (a < b) { _ '}UNIL
data[k] = temp[i++]; ~+1t17
a = temp; J4JKAv~3
} else { Ltu;sw
data[k] = temp[j--]; U_!6pqFc
b = temp[j]; {:? -)Xq
} N#UyAm<9
} S |B7HS5
} ){,8}(|
0>AA-~=-
/** NQOdgp
* @param data ^ sz4rk
* @param l ]v+\v re
* @param i 9iv!+(ni
*/ :${Lm&J
private void insertSort(int[] data, int start, int len) { :0]KIybt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vm Hf$rq
} Dl7#h,GTc<
} JU~l
} F&uU ,);
} 8J>s|MZ
.<tb*6rX>
堆排序： 3n,F5?!m
)Z]8SED
package org.rut.util.algorithm.support; h-6kf:XP%
;Neld #%J
import org.rut.util.algorithm.SortUtil; H_jMl$f)j
(llg!1
/** H*!E*_
* @author treeroot 3vMfms
* @since 2006-2-2 -ERDWY
* @version 1.0 JWEqy+,Fjw
*/ HtXzMSGo7
public class HeapSort implements SortUtil.Sort{ $cYh X^YG.
x=9drKIw>
/* (non-Javadoc) B>JRta;hj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iptzVr#b[
*/ X)'uTf0
public void sort(int[] data) { oo/#]a
MaxHeap h=new MaxHeap(); aiz_6@Qfz*
h.init(data); r% qgLP{v
for(int i=0;i h.remove(); []'BrG)!
System.arraycopy(h.queue,1,data,0,data.length); >y2gfD
} O>}aK.H
Y>IEB,w
private static class MaxHeap{ jy6% CSWQ
\# #~Tq
void init(int[] data){ eM{+R^8
this.queue=new int[data.length+1]; @C?RbTHy
for(int i=0;i queue[++size]=data; ?a(ApD\
fixUp(size); 4D0"Y#&G
} $_NVy>\&
} Z~v.!j0
pWeKN`
private int size=0; _O)~<Sk-*z
QKe=/;
private int[] queue; qL]!/}
2x t 8F
public int get() { S\mh{#Lpk
return queue[1]; meE&, {
} 3!#d&
6=iz@C7r
public void remove() { r IY_1
SortUtil.swap(queue,1,size--); p'!cGJL
fixDown(1); <kp?*xV]]
} V|DAw[!6N
file://fixdown }ob#LC,
private void fixDown(int k) { XB^o>/|@S
int j; ;QS-a
while ((j = k << 1) <= size) { *ewE{$UpK
if (j < size %26amp;%26amp; queue[j] j++; 4OC^IS
if (queue[k]>queue[j]) file://不用交换 *i&ks>4N
break; R9^Vk*`gFU
SortUtil.swap(queue,j,k); RYy_Ppn96f
k = j; l7nc8K
} 'tklz*
} `gx_+m^
private void fixUp(int k) { HW)> `
while (k > 1) { pFx7URZA
int j = k >> 1; [a`89'"z
if (queue[j]>queue[k]) >6KuZ_
break; 7gNJ}pLDx
SortUtil.swap(queue,j,k); Nxp7/Nn3
k = j; 1@egAo)
} 1 VcZg%I
} 0p)#!$
Etj@wy/E
} 2ntL7F<ow
+7.\>Ucq`
} 4v_<<l
r".*l?=
SortUtil： z;J"3kM
}CIH1q3P
package org.rut.util.algorithm; A_i=hj2f
9rf6,hF
import org.rut.util.algorithm.support.BubbleSort; 'H0uvvhOp
import org.rut.util.algorithm.support.HeapSort; k+t?EZ6L
import org.rut.util.algorithm.support.ImprovedMergeSort; )w4i0Xw^C:
import org.rut.util.algorithm.support.ImprovedQuickSort; ~+ Mp+gE
import org.rut.util.algorithm.support.InsertSort; -XRn%4EX?
import org.rut.util.algorithm.support.MergeSort; \QGh@AQp"
import org.rut.util.algorithm.support.QuickSort; Y{ijSOl3
import org.rut.util.algorithm.support.SelectionSort; 49W@?:b
import org.rut.util.algorithm.support.ShellSort; N2#Wyt8MC
5<^$9('
/** C8W#$a
* @author treeroot oc7&iL
* @since 2006-2-2 aJdd2,e
* @version 1.0 H,u{zU')
*/ %-1-y]R|
public class SortUtil { m:SG1m_6
public final static int INSERT = 1; zk#"n&u0
public final static int BUBBLE = 2; #ueWU
public final static int SELECTION = 3; oR}cE Sr
public final static int SHELL = 4; i&=I5$
public final static int QUICK = 5; <Nwqt[.
public final static int IMPROVED_QUICK = 6; > mk>VM
public final static int MERGE = 7; (E[c-1s
public final static int IMPROVED_MERGE = 8; ]Dec/Nnj
public final static int HEAP = 9; y(^t&tgjS
<n? cRk'.
public static void sort(int[] data) { '{*{
sort(data, IMPROVED_QUICK); _UI*W&*
} xq$(=WPI
private static String[] name={ `ECY:3"$KA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {%Cb0Zh
}; Vq-W|<7C=
w`KqB(36
private static Sort[] impl=new Sort[]{ Lz6b9W
new InsertSort(), B>C+qj@
new BubbleSort(), =S+*=jA
new SelectionSort(), Z(F['Zf
new ShellSort(), M~+}ss
new QuickSort(), xP/?E
new ImprovedQuickSort(), VW&EdrR,S
new MergeSort(), )cP&c=
new ImprovedMergeSort(), S1$lNB
new HeapSort() WVZ](D8Gc]
}; 3u[m? Vw
SbLm
public static String toString(int algorithm){ n#$sLXVy
return name[algorithm-1]; +{#65z
} OEiu,Y|@l
>f$NG
public static void sort(int[] data, int algorithm) { #K#BNpG|
impl[algorithm-1].sort(data); 7XzhKA6
} p+7G
;z2\ Q$
public static interface Sort { ?qC6p|H
public void sort(int[] data); 3-~*
} _nwsIjsW
$/p0DY
public static void swap(int[] data, int i, int j) { kx{LY`pY
int temp = data; 9[2qgw\D
data = data[j]; (;!92ct[?
data[j] = temp; {'#1do}{
} I-Q@v`
} wE3L,yx=