[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; VMgO1-F
} aOK,Mm:iO
int i1=l; E6_.Q `!ll
int i2=mid+1; Dvz}sQZ
for(int cur=l;cur<=r;cur++){ d|RDx;rl8
if(i1==mid+1) 7@l.ZECJ1
data[cur]=temp[i2++]; !a<}Mpeg
else if(i2>r) 0w<G)p~%n
data[cur]=temp[i1++]; 9#D?wR#J=
else if(temp[i1] data[cur]=temp[i1++]; oH]"F
else 3*;S%1C^
data[cur]=temp[i2++]; |8s45g>
} \o=YsJ8U
} 8CN~o|uN
#Ss lH
} *hZ{>
R@Bnrk
改进后的归并排序: V/CZcMY_
SRBQ"X[M2
package org.rut.util.algorithm.support; `8<h aU
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import org.rut.util.algorithm.SortUtil; 4M{]YZMw8
6$_//
/** A.>TD=Nz
* @author treeroot F` "bMS
* @since 2006-2-2 2j(]Bt:
* @version 1.0 'D<84|w:1
*/ X4dXO5\
public class ImprovedMergeSort implements SortUtil.Sort { H6/C7
b0ablVk
private static final int THRESHOLD = 10; %3A~&
mb_~ "}A
/* dPO|x+N,
* (non-Javadoc) HA W57N
* xXn2M*g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P K9BowlW
*/ Ki{]5Rz
public void sort(int[] data) { 'H.,S_v1x
int[] temp=new int[data.length]; $9m>(b/;n
mergeSort(data,temp,0,data.length-1); ^s[OvJb
} .GH#`j
IolKe:'>@
private void mergeSort(int[] data, int[] temp, int l, int r) { /C"?Y'
int i, j, k; %jRqrICd
int mid = (l + r) / 2; JMIS*njq^
if (l == r) O~=|6#c
return; "E/UNE6P4
if ((mid - l) >= THRESHOLD) dxAP7v
mergeSort(data, temp, l, mid); .Bb86Y=3
else ];VJ54
insertSort(data, l, mid - l + 1); "Oj2B|:s&
if ((r - mid) > THRESHOLD) 2,.;Mdl
mergeSort(data, temp, mid + 1, r); |ZBHXv
else \]gUX-
insertSort(data, mid + 1, r - mid); wjnQK
LYvjqNC&4
for (i = l; i <= mid; i++) { !3 j@gi2
temp = data; pXBlTZf
} Z{gJm9
for (j = 1; j <= r - mid; j++) { lhRo+X#G
temp[r - j + 1] = data[j + mid]; w=MiJr#3^
} Q@HW`@i
int a = temp[l]; 8M9}os
int b = temp[r]; $yY\[C
for (i = l, j = r, k = l; k <= r; k++) { i!k5P".o^
if (a < b) { O2 sAt3'
data[k] = temp[i++]; bQelU
a = temp; Se>"=[=
} else { N@>o:(08
data[k] = temp[j--]; w,qYT-R
b = temp[j]; %\ef Mhn
} ghu8Eg,Y
} NP_b~e6O=
} _b(y"+k
LtIw{*3
/** %A ^qm
* @param data e+ckn
* @param l pg:1AAhT[
* @param i ="=Aac#n`
*/ nL]-]n;
private void insertSort(int[] data, int start, int len) { <~}#Q,9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nm.~~h+8M
} h..D1(M
} @%}4R`S0
} 5oP31
} :2_8.+:
yw3E$~k
堆排序： }jWZqIqj
S85}&\m&4
package org.rut.util.algorithm.support; dD{{G:V
]BiLLDz(
import org.rut.util.algorithm.SortUtil; a$K.Or}
= ^OXP+o
/** j9XRC9
* @author treeroot eYD|`)-f<^
* @since 2006-2-2 `3KXWN`.s
* @version 1.0 _T)G?iv:&
*/ 2A^>>Q/,u
public class HeapSort implements SortUtil.Sort{ \vR&-+8dk
/y~ "n4CK~
/* (non-Javadoc) )QO"1#zg@c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ` e~nn
*/ ]l.qp5eQ
public void sort(int[] data) { t:?8I9d
MaxHeap h=new MaxHeap(); gfW8s+
h.init(data); /^F$cQX(
for(int i=0;i h.remove(); Q\ AM] U
System.arraycopy(h.queue,1,data,0,data.length); D3BNA]P\2@
} f6d:5 X_
n,+/%IZ
private static class MaxHeap{ 5`?'}_[Yj
Hve'Z,X
void init(int[] data){ i& ,Wg8#R
this.queue=new int[data.length+1]; +dIO+(&g
for(int i=0;i queue[++size]=data; 0s#`H
fixUp(size); P$=BmBq18`
} :UrS@W^B
} j(*ZPo>oD
zYW+Goz/C
private int size=0; RIDzNdM>U
`J(im
private int[] queue; |9X$@R
X$<s@_#1
public int get() { nM?mdb
return queue[1]; HpD<NVu
} jhN]1t/\X
:@H&v%h(u
public void remove() { ",hPy[k
SortUtil.swap(queue,1,size--); \k69 S/O
fixDown(1); +UGWTO\#ha
} xpb,Nzwt^
file://fixdown NLz[F`I
private void fixDown(int k) { E>}(r%B
int j; +oT/v3,
while ((j = k << 1) <= size) { `qnNEJL,
if (j < size %26amp;%26amp; queue[j] j++; 4%(\y"T
if (queue[k]>queue[j]) file://不用交换 [A.ix}3mm
break; scsN2#D7U/
SortUtil.swap(queue,j,k); I!L`W _
k = j; _+vE(:T
} >5aZ?#TS1
} A=z+@b6
private void fixUp(int k) { TfbB1
while (k > 1) { "Y> #=>8
int j = k >> 1; _7#9nJ3|
if (queue[j]>queue[k]) 1JFCYJy
break; nX|f?5 O
SortUtil.swap(queue,j,k); U^n71m>]%T
k = j; XIAHUT5~J
} )Uk!;b
} H:d@@/
d*e0/#s
} d\_$Nb*
z~S(OM@olJ
} b85r=tm
zB?} {@
SortUtil： mYy{G s7
LL}|#%4d
package org.rut.util.algorithm; r}1.=a
xxsax/h
import org.rut.util.algorithm.support.BubbleSort; oVK3=m@{
import org.rut.util.algorithm.support.HeapSort; S{qc1qj
import org.rut.util.algorithm.support.ImprovedMergeSort; 4NY}=e5
import org.rut.util.algorithm.support.ImprovedQuickSort; >+P5Zm(_
import org.rut.util.algorithm.support.InsertSort; jOYa}jm?
import org.rut.util.algorithm.support.MergeSort; ^Pq4 n%x
import org.rut.util.algorithm.support.QuickSort; f[AN=M"B"s
import org.rut.util.algorithm.support.SelectionSort; ;9+[t8Y)D
import org.rut.util.algorithm.support.ShellSort; lD%Fk3
!m* YPY31
/** w Bi'KS
* @author treeroot $hn=MOMc
* @since 2006-2-2 j0XS12eM
* @version 1.0 Y2j>@
*/ R0l5"l*@+
public class SortUtil { 'K L"i
public final static int INSERT = 1; nI63Ns
public final static int BUBBLE = 2; -8r';zR
public final static int SELECTION = 3; /3VSO"kcZ
public final static int SHELL = 4; 1^x"P#u
public final static int QUICK = 5; #s\HiO$BT
public final static int IMPROVED_QUICK = 6; C3XB'CL6
public final static int MERGE = 7; [%);N\o2Y
public final static int IMPROVED_MERGE = 8; j>{Dbl:#2
public final static int HEAP = 9; R7q\^Yzo
co93}A,k
public static void sort(int[] data) { &tAhRMa
sort(data, IMPROVED_QUICK); !>,\KxnM
} /f5*KRM
private static String[] name={ 4Pbuv6`RK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t==CdCl
}; Xiy9Oeq2uh
m>H+noc^
private static Sort[] impl=new Sort[]{ ?)_?YLi
new InsertSort(), fbG+.'
new BubbleSort(), `Mh3v@K:
new SelectionSort(), &!xePKvO6k
new ShellSort(), GQ@`qYLZ+
new QuickSort(), j.?c~Fh
new ImprovedQuickSort(), al<;*n{/
new MergeSort(), >{seaihK
new ImprovedMergeSort(), OzVCqq"]
new HeapSort() H'Oy._,]t
}; {CO]wqEj
iOFp9i=j
public static String toString(int algorithm){ H8'q Y
return name[algorithm-1]; B#+0jdF;
} o#D;H[' A
Mx7
public static void sort(int[] data, int algorithm) { StuQ}
impl[algorithm-1].sort(data); y.xyr"-Q
} QgR3kc^7/
)g()b"Z #>
public static interface Sort { SH009@l_8
public void sort(int[] data); F&Bh\C)]
} r+0<A.''a
Z}8khNCYr
public static void swap(int[] data, int i, int j) { y:m ;_U,%c
int temp = data; z(8:7 G
data = data[j]; vuNt+
data[j] = temp; !R 2;]d*
} KWq&<X5
} @PaOQ@