[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; lpd~U2&
} L})fYVX
int i1=l; G,6`:l
int i2=mid+1; |CQjgI|;
for(int cur=l;cur<=r;cur++){ +R$;LtR
if(i1==mid+1) AvIheR
data[cur]=temp[i2++]; .FYRi_Zd
else if(i2>r) h+dk2|a
data[cur]=temp[i1++]; q~18JB4WPJ
else if(temp[i1] data[cur]=temp[i1++]; s,C>l_4-
else s(5(zcBK
data[cur]=temp[i2++]; ?N+pWdi
} _ZWU~38PM
} 6V9r[,n
IY~I=}
} }|-8-;
ZHwN3
改进后的归并排序: 3>5gh8!-
|VE.khq#
package org.rut.util.algorithm.support; \p\p~FVS
1h162
import org.rut.util.algorithm.SortUtil; <Qbqxw
u6E ze4u
/** R))4J
* @author treeroot ~yngH0S$[b
* @since 2006-2-2 bA6^RIf?
* @version 1.0 x`p908S^
*/ -NzOX"V]3
public class ImprovedMergeSort implements SortUtil.Sort { ^755LW
@VND}{j
private static final int THRESHOLD = 10; 1*#hIuoj'
mWoN\Rwj
/* )abH//Pps.
* (non-Javadoc) &a >UVs?=
* yWN'va1+$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5^qs>k[mN
*/ S=L#8CID
public void sort(int[] data) { BB/c5?V
int[] temp=new int[data.length]; o{2B^@+Vb
mergeSort(data,temp,0,data.length-1); x `%x f
} K)Ya%%6[U#
9$(N q
private void mergeSort(int[] data, int[] temp, int l, int r) { fP;I{AiN~
int i, j, k; 0ly6 |:
int mid = (l + r) / 2; (t"|XSF
if (l == r) Vw.4;Zy(
return; FAGi`X<L
if ((mid - l) >= THRESHOLD) n68qxD-X
mergeSort(data, temp, l, mid); O#^qd0e'P!
else sV%=z}n=
insertSort(data, l, mid - l + 1); frQ=BV5%6
if ((r - mid) > THRESHOLD) oY\;KPz
mergeSort(data, temp, mid + 1, r); -G1R><8[
else Uu`}| &@i
insertSort(data, mid + 1, r - mid); !}eq~3
rJp9ut'FEz
for (i = l; i <= mid; i++) { o9{1_7K
temp = data; ]G! APE
} C-Y7n5
for (j = 1; j <= r - mid; j++) { z`J-J*R>d
temp[r - j + 1] = data[j + mid]; g]b%<DJ
} 21?>rezJ
int a = temp[l]; pXNH
int b = temp[r]; aO:A pOAO
for (i = l, j = r, k = l; k <= r; k++) { xy)W_~Mk
if (a < b) { :W'.SRD
data[k] = temp[i++]; '7]9q#{su
a = temp; 5"x1Pln
} else { >G0ihhVt
data[k] = temp[j--]; ]VN1Y)
b = temp[j]; Ox aS<vQ3
} wxG*mOw
} ~ayU\4B
} N9H qFp
odvUU#l
/** li`
* @param data Ac>GF
* @param l +b dnTV6
* @param i #KLW&A
*/ qm=9!jqC;
private void insertSort(int[] data, int start, int len) { )qWO}]F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p:!FB8
} (/P-9<"U
} y+.(E-g
} :bP <H
} SwH#=hg
ka8=`cn
堆排序： >BMtR0
~c=*Y=)LG
package org.rut.util.algorithm.support; bOlb
XOZ@ek)LY
import org.rut.util.algorithm.SortUtil; \7(OFT\u:
)d5mZE!3
/** JkNRXC:
* @author treeroot OH5#.${O
* @since 2006-2-2 u])MI6LF
* @version 1.0 I\82_t8
*/ 2$ \#BG
public class HeapSort implements SortUtil.Sort{ (>om.FM
Nm0|U.<
/* (non-Javadoc) cl'qw##
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zL+M-2hV
*/ yA<\?Ps
public void sort(int[] data) { I]~UOl
MaxHeap h=new MaxHeap(); 7YU}-gi
h.init(data); Eo{js?1G_
for(int i=0;i h.remove(); Js,.$t
System.arraycopy(h.queue,1,data,0,data.length); `b5pa`\4
} Ed"p|5~
G7HvA46
private static class MaxHeap{ .!1E7\
CakB`q(8
void init(int[] data){ <*4r6UFR
this.queue=new int[data.length+1]; gn${@y?
for(int i=0;i queue[++size]=data; @%As>X<3t
fixUp(size); ,xC@@>f
} =NL(L
} wIQt f|ZI>
M0MvOO*ad
private int size=0; DB+.<
yu'@gg(
private int[] queue; O/f+B}W
?CuwA-j
public int get() { OxVe}Fym
return queue[1]; >uz3 O?z P
} X gA( D
l9$"zEC
public void remove() { [Kanj/
SortUtil.swap(queue,1,size--); oSs~*mf
fixDown(1); )!D,;,aQ
} #Bas+8 @,
file://fixdown LZ~}*}jy
private void fixDown(int k) { meyO=>
int j; , *Z!Bd8
while ((j = k << 1) <= size) { pU@&-
if (j < size %26amp;%26amp; queue[j] j++; xR5zm%\
if (queue[k]>queue[j]) file://不用交换 !JwR[X\f
break; ~jOk?^6
SortUtil.swap(queue,j,k); ~@VyJT%
k = j; 1:q5h*
} ~0gHh
} e:WKb9nT
private void fixUp(int k) { Ne2eBmY}(
while (k > 1) { n]WVT@
int j = k >> 1; vF$sVu|B
if (queue[j]>queue[k]) E$E#c8I:
break; UJQGwTA W
SortUtil.swap(queue,j,k); ft4(^|~
k = j; ^9?IS<N0]
} p#AQXIF0
} kR;Hb3hb
QpMi+q Y
} 5*Y(%I<
,CQg6-[
} #?RT$L>n
i~EFRI@
SortUtil： MJI`1*(
:0j_I\L
package org.rut.util.algorithm; rIWQD%Afm
%8g1h)F"S
import org.rut.util.algorithm.support.BubbleSort; 7F wot&
import org.rut.util.algorithm.support.HeapSort; 05o 1
import org.rut.util.algorithm.support.ImprovedMergeSort; /gq VXDY+`
import org.rut.util.algorithm.support.ImprovedQuickSort; c\(CbC
import org.rut.util.algorithm.support.InsertSort; 45tQ$jr`1
import org.rut.util.algorithm.support.MergeSort; {3*Zx"e![
import org.rut.util.algorithm.support.QuickSort; >du|DZq
import org.rut.util.algorithm.support.SelectionSort; X< p KAO\
import org.rut.util.algorithm.support.ShellSort; Y`!Zk$8
5TS&NefM
/** W 33MYw
* @author treeroot #w#:f
* @since 2006-2-2 _tQR3I5
* @version 1.0 ?=0BU}
*/ WBY_%RTx
public class SortUtil { NN@'79x
public final static int INSERT = 1; h7F5-~SpD
public final static int BUBBLE = 2; K0]42K
public final static int SELECTION = 3; xg_9#
public final static int SHELL = 4; ,LVZ
public final static int QUICK = 5; #>dj!33
public final static int IMPROVED_QUICK = 6; FkY <I]F
public final static int MERGE = 7; X_2pC|C
public final static int IMPROVED_MERGE = 8; ) i=.x+Q
public final static int HEAP = 9; ,FDRU
MON]rj7
public static void sort(int[] data) { *'hJ5{U
sort(data, IMPROVED_QUICK); 6~c:FsZ)
} R&]#@PW^
private static String[] name={ *32hIiCm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =/MA`>
}; jdAjCy;s!
BXB ZX@jVk
private static Sort[] impl=new Sort[]{ 7Nt6}${=z
new InsertSort(), [e;c)XS[
new BubbleSort(), cMp#_\B
new SelectionSort(), 8a3h)R
new ShellSort(), 6h:2,h pE
new QuickSort(), Av_JcH
new ImprovedQuickSort(), g!DJW
new MergeSort(), YzVhNJWpw
new ImprovedMergeSort(), 4Bz:n
new HeapSort() ;30SnR/
}; nb_$g@03
VQwF9Iq]`
public static String toString(int algorithm){ b,uudtlH
return name[algorithm-1]; EN;s 8sC!
} =WM^i86
5V@c~1\
public static void sort(int[] data, int algorithm) { 'j(F=9)
impl[algorithm-1].sort(data); 'Uu!K!
} yttaZhK^u
kBg8:bo~
public static interface Sort { aGq1YOD[$
public void sort(int[] data); q1?}G5a?
} kqQT^6S
Gqs)E"h
public static void swap(int[] data, int i, int j) { Tqj:C8K{
int temp = data; D,P{ ,/
data = data[j]; JK'FJ}Z4
data[j] = temp; l~Rd\.O
} yr/G1?k%ML
} S^T ><C