[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; K*[wr@)u
} ;rbn/6
int i1=l; @,.H)\a4
int i2=mid+1; dno*Usx5d0
for(int cur=l;cur<=r;cur++){ &*~ WK
if(i1==mid+1) Uy=eHwU?J
data[cur]=temp[i2++]; "w1jr 6"
else if(i2>r) H*IoJL6
data[cur]=temp[i1++]; QB>e(j%
else if(temp[i1] data[cur]=temp[i1++]; !s:|Ddv
else :=@[FXD4
data[cur]=temp[i2++]; FT6cOMu
} LA5rr}<K
} CJ b~~
cj)~7 WF
} eS|p3jk;
-)GfSk
改进后的归并排序: >6j`ZWab>
zQJbZ=5Bu"
package org.rut.util.algorithm.support; b%F*Nr
.>e~J+oL
import org.rut.util.algorithm.SortUtil; @P>@;S
C+j+q648>
/** LV0{~g(!%
* @author treeroot *lSIT]1
* @since 2006-2-2 <j'#mUzd
* @version 1.0 `P~RG.HO
*/ (;3jmdJhK
public class ImprovedMergeSort implements SortUtil.Sort { 1GxYuTZ{
49D*U5o
private static final int THRESHOLD = 10; umeb&\:8S-
Oh: -Y]m=
/* _{aVm&^kA
* (non-Javadoc) gg9W7%t/
* }sZ]SE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /k,p]/e
*/ tz{]H9
public void sort(int[] data) { ) AIZE?oX
int[] temp=new int[data.length]; /~Iy1L#
mergeSort(data,temp,0,data.length-1); S3m+(N"&
} rX[R`,`>Z[
RVe3@|9(G
private void mergeSort(int[] data, int[] temp, int l, int r) { xMU)
int i, j, k; ~i4@sz&
int mid = (l + r) / 2; \l~h#1|%;s
if (l == r) 6pse@x?
return; zc"eSy< w$
if ((mid - l) >= THRESHOLD) LY MfoXp
mergeSort(data, temp, l, mid); 8VnZ@*
else UJI1n?~
insertSort(data, l, mid - l + 1); RK0IkRXQd
if ((r - mid) > THRESHOLD) 6lPGop]js]
mergeSort(data, temp, mid + 1, r); h4CB1K
else aw`mB,5U
insertSort(data, mid + 1, r - mid); 2iu;7/
<fxYTd<#D[
for (i = l; i <= mid; i++) { &'R]oeag
temp = data; K67x.PZ
} Onl:eG;@
for (j = 1; j <= r - mid; j++) { mP-+];gg
temp[r - j + 1] = data[j + mid]; Xo,BuK&G
} -mXEbsm
int a = temp[l]; G7yxCU(I\
int b = temp[r]; L2N/DB'{
for (i = l, j = r, k = l; k <= r; k++) { TBpW/wz/
if (a < b) { S}+n\pyQ
data[k] = temp[i++]; l"Css~^
a = temp; VybiuP
} else { @ 9uwcM1F
data[k] = temp[j--]; 8PQ& 7o
b = temp[j]; ``={FaV~m
} laAG%lq/'
} )}R0'QGd
} 2Y,s58F
@`3)?J[w
/** '=r.rW5
* @param data k$zDofdfp
* @param l C$_H)I
* @param i #Jn_"cCRLx
*/ Sb<=ROCg@
private void insertSort(int[] data, int start, int len) { ,^3D"Tky
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6^p6v
} +um; eL7
} 82$^pg>
} J&5|'yVX
} g+f{I'j
sx9N8T3n
堆排序： jN[Z mJz'
nQ mkDPjU
package org.rut.util.algorithm.support; *I~F7Z]|
PiN3t]2
import org.rut.util.algorithm.SortUtil; #2}S83 k
#2pgh?
/** sbRg=k&Ns
* @author treeroot =zsXa=<
* @since 2006-2-2 Jyd%!v
* @version 1.0 \"5\hX~dS
*/ Yz,*Q<t
public class HeapSort implements SortUtil.Sort{ Ys\l[$_`*
} nQHP4'
/* (non-Javadoc) %K zURv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5K8\hoW{
*/ re<"%D
public void sort(int[] data) { 9Y7 tI3
MaxHeap h=new MaxHeap(); 1$c*/Tc:E
h.init(data); 4X^0:.bT&
for(int i=0;i h.remove(); wc;5tb#
System.arraycopy(h.queue,1,data,0,data.length); L-fAT'!'
} '+`CwB2
(\]_/ W
private static class MaxHeap{ REHfk6YE
Ouj5NL
void init(int[] data){ ;$86.2S>B
this.queue=new int[data.length+1]; 9AS,-5;XQ
for(int i=0;i queue[++size]=data; ,7eN m>$
fixUp(size); a+MC[aFr
} #0weN%
} IqmavnM#
{|a' =I#2
private int size=0; h.DQ6!?;s
;Eck7nRA)
private int[] queue; t]Vw`z%G
62.{8Uj
public int get() { 7m1*Q@D
return queue[1]; m'%F,c)
} ;R/=9l
nuvz!<5\{
public void remove() { Z#9{1sHEP
SortUtil.swap(queue,1,size--); 0O[q6!&]
fixDown(1); #u#s'W
} Nz2}Ma 2
file://fixdown F7mzBrz
private void fixDown(int k) { r&^4L
int j; ~=}56yxl[
while ((j = k << 1) <= size) { 7^S&g.A
if (j < size %26amp;%26amp; queue[j] j++; H>M0GL
if (queue[k]>queue[j]) file://不用交换 y1P?A]v
break; ~jJu*s$?
SortUtil.swap(queue,j,k); gp;(M~we
k = j; 4H{L>e
} i<-#yL5
} @T1-0!TM')
private void fixUp(int k) { MYLq2g\
while (k > 1) { 4/HyO\?z5
int j = k >> 1; ww=< =
if (queue[j]>queue[k]) _))_mxV{
break; 5Pn$@3
SortUtil.swap(queue,j,k); y9:|}Vh
k = j; e=YvMg
} N-lXC"{)
} 8^+Qn/b_%
t:W`=^
} cD7q;|+
$lUZm\R|k
} #t9&X8:U
IA''-+9
SortUtil： : wb\N'b
w!%Bc]
package org.rut.util.algorithm; eml(F
\\BblzGMR
import org.rut.util.algorithm.support.BubbleSort; Yr"G)i~"Y
import org.rut.util.algorithm.support.HeapSort; {n{ j*+
import org.rut.util.algorithm.support.ImprovedMergeSort; Lk`0z
import org.rut.util.algorithm.support.ImprovedQuickSort; M7UVL&_z%
import org.rut.util.algorithm.support.InsertSort; TqCzpf&&h/
import org.rut.util.algorithm.support.MergeSort; CI ~+(+q
import org.rut.util.algorithm.support.QuickSort; Zb3E-'G+
import org.rut.util.algorithm.support.SelectionSort; ln9U>*<
import org.rut.util.algorithm.support.ShellSort; ]l`?"X|^
RKRk,jRL
/** }[?X%=
* @author treeroot gryC#
* @since 2006-2-2 mR?OSeeB
* @version 1.0 R$wo{{KX
*/ s!uewS.
public class SortUtil { Au@U;a4UU
public final static int INSERT = 1; !%sj-RMvG
public final static int BUBBLE = 2; o)srE5
public final static int SELECTION = 3; DL<r2h
public final static int SHELL = 4; 4,UvTw*2z
public final static int QUICK = 5; Bz]j&`
public final static int IMPROVED_QUICK = 6; 'd'*4 )]k
public final static int MERGE = 7; & Z*&&
public final static int IMPROVED_MERGE = 8; q=Q5s?sQc
public final static int HEAP = 9; |G!-FmIK
nQb{/ TqC'
public static void sort(int[] data) { bv-s}UP0
sort(data, IMPROVED_QUICK); pb6z)8
} PudwcP{
private static String[] name={ [iB`- dE,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cC b'z1
}; 89?AcZ.D
S"V|BU
private static Sort[] impl=new Sort[]{ n:x6bPal]
new InsertSort(), 44]/rP_m
new BubbleSort(), x)5#*Q
new SelectionSort(), Q3'\Vj,S&
new ShellSort(), QzCu$ [
new QuickSort(), I~gU3(
new ImprovedQuickSort(), eBlVb*nmq
new MergeSort(), _/]4:("
new ImprovedMergeSort(), 4F^(3RKZ|
new HeapSort() +'x|VPY.PG
}; ZQZ>{K
grp1nWAs
public static String toString(int algorithm){ oX8e}
return name[algorithm-1]; *&^`Uk,[
} $x)C_WZj?
v=RQ"iv8
public static void sort(int[] data, int algorithm) { ^dM,K p
impl[algorithm-1].sort(data); zkA"2dh
} IJhJfr0)Oo
E}00y%@*J
public static interface Sort { cL?FloPc*
public void sort(int[] data); M\ B A+
} j:0(=H!#
~L<q9B( @
public static void swap(int[] data, int i, int j) { !:'%'@uc
int temp = data; z|x0s0q?
data = data[j]; Gn>#Mvq
data[j] = temp; =TE6R 0b
} /n"Ib)M
} b<u