[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; #y|V|nd
} d3^OEwe
int i1=l; rw)kAe31
int i2=mid+1; 0ult7s}
for(int cur=l;cur<=r;cur++){ '&;yT[
if(i1==mid+1) aQ j*KMc
data[cur]=temp[i2++]; rwIeqV{:
else if(i2>r) i*R,QN)
data[cur]=temp[i1++]; fri0XxF
else if(temp[i1] data[cur]=temp[i1++]; mW%?>Z1=>d
else 22(*J<
data[cur]=temp[i2++]; BK,sc'b
} l<(Y_PE:
} ~7!7\i,Y8\
N)% ;jh:T
} yk2!8
97!>%d[0
改进后的归并排序: W(fr<<hL
l8K5k:XCU3
package org.rut.util.algorithm.support; 27ckdyQx
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import org.rut.util.algorithm.SortUtil; KNgH|5Pb
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/** Cc?TSZ8[
* @author treeroot \8OO)98'
* @since 2006-2-2 -)!>M>=s
* @version 1.0 Ch )dLPz@
*/ pS4&w8s
public class ImprovedMergeSort implements SortUtil.Sort { #<( = }?
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private static final int THRESHOLD = 10; TST4Vy3
(eCFWmO
/* ECa$vvK m
* (non-Javadoc) 9s +z B
* -VDo[Zy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nxQ?bk}*d
*/ vFrt|JC_{
public void sort(int[] data) { mYB`)M*Y
int[] temp=new int[data.length]; :"0J=>PH:
mergeSort(data,temp,0,data.length-1); b{DiM098
} UkCnqNvx
$V6^G*Q
private void mergeSort(int[] data, int[] temp, int l, int r) { *s}|Hy
int i, j, k; o A*G
int mid = (l + r) / 2; g=}v>[k E
if (l == r) J` {6l
return; +a= 0\lpOy
if ((mid - l) >= THRESHOLD) #n\C |
mergeSort(data, temp, l, mid); y'ja< 1I>
else wxLXh6|6%_
insertSort(data, l, mid - l + 1); }W)=@t
if ((r - mid) > THRESHOLD) ,(G%e
mergeSort(data, temp, mid + 1, r); gJ2 H=#M
else (kTXP_
insertSort(data, mid + 1, r - mid); &K^MNd
<I;*[;AK
for (i = l; i <= mid; i++) { U3vEdw<lV
temp = data; YEjY8]t
} 5=?i;P
for (j = 1; j <= r - mid; j++) { AV&yoag1
temp[r - j + 1] = data[j + mid]; jn9 ShF
} ~c{:DM
int a = temp[l]; cd;NpN
int b = temp[r]; h$C@j~
for (i = l, j = r, k = l; k <= r; k++) { DJh&#b
if (a < b) { ydWtvFuS
data[k] = temp[i++]; !rxp?V n -
a = temp; PM$Ee #62R
} else { &ntBU]<q
data[k] = temp[j--]; \o3"~\|6C
b = temp[j]; j_?cpm{~ml
} FgA//)1
} dTEJ=d40
} BH0!6Oq
jj\[7 O*
/** {gf>*
* @param data e{G_GycH
* @param l rqCa 2
* @param i wCZO9sU:6=
*/ QL"gWr`R
private void insertSort(int[] data, int start, int len) { D_|B2gdZY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hQJWKAf,/
} >Pe:I
} P#GD?FUc
} AZFWuPJo
} >e5zrgV
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堆排序： r -f
0rMqWP
package org.rut.util.algorithm.support; urY`^lX~
o%(bQV-T
import org.rut.util.algorithm.SortUtil; /L) 9tt.
MQcE6)
/** 5{>0eFzG
* @author treeroot <D/al9
* @since 2006-2-2 j~ym<-[{a
* @version 1.0 g"t^r3
*/ V*B0lI7`B
public class HeapSort implements SortUtil.Sort{ 4".J/I5u
.PVLWW
/* (non-Javadoc) eVnbRT2y&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) si/er"&o
*/ qc!xW,I
public void sort(int[] data) { _^uc 0=
MaxHeap h=new MaxHeap(); l^ 4OC
h.init(data); &R]pw`mTH
for(int i=0;i h.remove(); 7{BnXN[
System.arraycopy(h.queue,1,data,0,data.length); hd^x}iK"
} G_oX5:J*
$fArk36O#
private static class MaxHeap{ |uha 38~
`ypL]$cW
void init(int[] data){ Md(JIlh3
this.queue=new int[data.length+1]; q&M:17+:Q
for(int i=0;i queue[++size]=data; K_-MkY?+
fixUp(size); =mrY/:V
} J6|JWp
} C@@$"}%v2
AF#_nK)@
private int size=0; &zN@5m$k;
`!c,y~r[
private int[] queue; .K9l*-e[=
cqQRU
public int get() { .Vx|'-u
return queue[1]; GEE ]Kr
} dXP6"V@iI
>_Uj?F:
public void remove() { k8&FDz
SortUtil.swap(queue,1,size--); Fe="EDh
fixDown(1); ?R?Grw)`H
} #4y,a_)
file://fixdown A o3HX
private void fixDown(int k) { i>Iee^_(
int j; gg8c7d:Q
while ((j = k << 1) <= size) { GJak.,0t
if (j < size %26amp;%26amp; queue[j] j++; .)ST[G]WK
if (queue[k]>queue[j]) file://不用交换 1)U}i ^
break; F!CAitxd
SortUtil.swap(queue,j,k); Dr'sIH^
k = j; [,7-w
} VN|G5*
} fNxw&ke8&
private void fixUp(int k) { Kfjryo9
while (k > 1) { ="lI i$>O
int j = k >> 1; 8IWwjyRr
if (queue[j]>queue[k]) *CUdGI&
break; vvh.@f
SortUtil.swap(queue,j,k); ;5M<j3_*
k = j; b7'F|h^
} h*'d;_(,
} }J;~P 9Y
iBHw[X,b
} t{ H1u
STlPT5e.}
} ;f(n.i
=jUnM>23
SortUtil： 56ZrCr
jM\ %$_/
package org.rut.util.algorithm; VCf|`V~G
0#`)Prop6
import org.rut.util.algorithm.support.BubbleSort; YKq0f=Ij
import org.rut.util.algorithm.support.HeapSort; L1MrrC
import org.rut.util.algorithm.support.ImprovedMergeSort; lM&UFEl-\
import org.rut.util.algorithm.support.ImprovedQuickSort; ?waebuj>
import org.rut.util.algorithm.support.InsertSort; =, TSMV
import org.rut.util.algorithm.support.MergeSort; U?EG6t
import org.rut.util.algorithm.support.QuickSort; (fd[P|G_]
import org.rut.util.algorithm.support.SelectionSort; QT_^M1%
import org.rut.util.algorithm.support.ShellSort; )d_U)b7i
#01/(:7
/** [|z'"Gk{
* @author treeroot WgZ@N
* @since 2006-2-2 ".M:`BoW4
* @version 1.0 28+HKbgK
*/ @H4wHlb
public class SortUtil { kd`YSkZ
public final static int INSERT = 1; EP0a1.C
public final static int BUBBLE = 2; OequU'j
public final static int SELECTION = 3; )]}$
public final static int SHELL = 4; >Qk97we'9
public final static int QUICK = 5; ER2V*,n@
public final static int IMPROVED_QUICK = 6; 7V/Zr
public final static int MERGE = 7; I}ndRDz[
public final static int IMPROVED_MERGE = 8; .pKN4
public final static int HEAP = 9; &z QWIv
l]u7.~b
public static void sort(int[] data) { +Z$a1Y@
sort(data, IMPROVED_QUICK); cE2Rr
} DCK_F8
private static String[] name={ rT<1S?jR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `r9^:TMN
}; [$oM
(ic@3:xR
private static Sort[] impl=new Sort[]{ EGEMZCdk2
new InsertSort(), `=v@i9cTZ
new BubbleSort(), DZ%8 |PmB
new SelectionSort(), X_!$Pk7ma
new ShellSort(), _;VYFs
new QuickSort(), .Map
new ImprovedQuickSort(), K_FBy
new MergeSort(), a^x 0 l
new ImprovedMergeSort(), @QX4 \
new HeapSort() 5 Af?Yxv
}; v'$ykZ!Z
uAQg"j
public static String toString(int algorithm){ 3m~U(yho
return name[algorithm-1]; 6<+8}`@B>G
} X;5S
vS2(Q0+TZi
public static void sort(int[] data, int algorithm) { rSbQ}O4V
impl[algorithm-1].sort(data); >["Kd.ye
} Y& m<lnB
hN}5u"pS
public static interface Sort { &#%D.@L
public void sort(int[] data); [@zkv)D6
} )Jmw|B
8vu2k>
public static void swap(int[] data, int i, int j) { vo.EM1x
int temp = data; hOV_Oqe4?
data = data[j]; eNivlJ,K|@
data[j] = temp; <%(f9j
} 7%X+O8
} fA;x{0CAMX