[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; 9C"d7--
} lDf:~
int i1=l; IV]2#;OO?
int i2=mid+1; %I^y@2A4`
for(int cur=l;cur<=r;cur++){ |K11Woii
if(i1==mid+1) Y)](jU%o
data[cur]=temp[i2++]; =K`]$Og}8
else if(i2>r) FJC}xEMcN
data[cur]=temp[i1++]; ?,AWXiif
else if(temp[i1] data[cur]=temp[i1++]; &`}8Jz=S
else T/YvCbo
data[cur]=temp[i2++]; 2`V[Nb
} `U6bI`l
} .8~zgpK
PpWn+''M
} ,enU`}9V*
=AVr<kP
改进后的归并排序: XT<{J8 0z
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package org.rut.util.algorithm.support; <ZwmXD.VD
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import org.rut.util.algorithm.SortUtil; 8(kP=
G8hq;W4@]/
/** c)Ep<W<r1
* @author treeroot wx*)7Y*
* @since 2006-2-2 d~za%2{
* @version 1.0 Yd>ej1<
*/ a]%>7yr4
public class ImprovedMergeSort implements SortUtil.Sort { enw7?|(
3w!,@=.q
private static final int THRESHOLD = 10; BSc5@;
8^U+P%
/* 863PVce",}
* (non-Javadoc) =zXA0%
* I7@g,~s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kM o7mkV
*/ 3B6"T;_
public void sort(int[] data) { laX67Vjv
int[] temp=new int[data.length]; )m4O7'2G
mergeSort(data,temp,0,data.length-1); |h{#r7H0
} 9+"\7MHw
YjTA+1}
private void mergeSort(int[] data, int[] temp, int l, int r) { kE*OjywN
int i, j, k; MET"s.v
int mid = (l + r) / 2; "U6:z M
if (l == r) go[(N6hN
return; X{-[ E^X
if ((mid - l) >= THRESHOLD) qR>"r"Fq
mergeSort(data, temp, l, mid); D8r=Vf
else ??g`c=R!V
insertSort(data, l, mid - l + 1); hrZ=8SrW
if ((r - mid) > THRESHOLD) se,0Rvkt
mergeSort(data, temp, mid + 1, r); 7$/%c{o
else Kulh:d:w
insertSort(data, mid + 1, r - mid); HyX:4f|]'
rZSX fgfr
for (i = l; i <= mid; i++) { -)dS`hM
temp = data; Ua](o H
} H6! <y-
for (j = 1; j <= r - mid; j++) { A"W}l)+X
temp[r - j + 1] = data[j + mid]; 7$HN5T\!
} xZpGSlA
int a = temp[l]; W%.ou\GN^t
int b = temp[r]; p#6V|5~8
for (i = l, j = r, k = l; k <= r; k++) { Ad'b{C%
if (a < b) { du0]LiHV
data[k] = temp[i++]; tM&;b?bJ[
a = temp; o;\c$|TNU
} else { U2@Mxw
data[k] = temp[j--]; DD(K@M
b = temp[j]; @*}?4wU^k
} WG\gf\=I
} F>!gwmn~
} Mq[|w2.
<6L=% \X{*
/** 1;$8=j2
* @param data $,v[<T`
* @param l !(L\X'jH
* @param i ulzQ[?OMl
*/ (RtjD`e}
private void insertSort(int[] data, int start, int len) { `x'vF#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sKU?"|G81G
} LG6k KG
} ( 8}'JvSu
} +CF"Bm8@
} -'jPue2\
WI+ 5x
堆排序： .o!z:[IPY
FA#?+kd
package org.rut.util.algorithm.support; ! !9l@
V`;$Ua;y
import org.rut.util.algorithm.SortUtil; MlBw=Nr
!`VC4o
/** tq^d1b(j4
* @author treeroot <GthJr>1D
* @since 2006-2-2 u^{6U(%
* @version 1.0 (b}}'
*/ =Lyo]8>,X
public class HeapSort implements SortUtil.Sort{ Nr(3!-
/Wqx@#
/* (non-Javadoc) jj&4Sv#>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1G6MO
*/ |>2IgTh1a
public void sort(int[] data) { zLa3Q\T
MaxHeap h=new MaxHeap(); buv*qPO
h.init(data); ^twJNm{99
for(int i=0;i h.remove(); ".=LzjE<gv
System.arraycopy(h.queue,1,data,0,data.length); 5W29oz}-S
} S5$sB{\R
D#?jddr-
private static class MaxHeap{ ju= +!nGUa
>.]'N:5
void init(int[] data){ QV@NA@;XZ
this.queue=new int[data.length+1]; djxM/"xo
for(int i=0;i queue[++size]=data; |0jmOcZF
fixUp(size); !^/Mn
} ZX Sl+k.
} p>c`GDU
8!c#XMHV
private int size=0; ,%a7sk<5k
hDf|9}/UQd
private int[] queue; ;C+g)BW
nHB=*Mj DV
public int get() { ;N FTdP
return queue[1]; =b* Is,R/
} .M$}.v
Z_F}Y2-w9
public void remove() { ~SW_jiKM
SortUtil.swap(queue,1,size--); }}VB#
fixDown(1); jD eNCJ
} %%w/;o!c
file://fixdown S_B $-H|
private void fixDown(int k) { tKik)ei
int j; `S{Blv
while ((j = k << 1) <= size) { R1%2]?
if (j < size %26amp;%26amp; queue[j] j++; 22<T.c
if (queue[k]>queue[j]) file://不用交换 u?>]C6$
break; vFL\O
SortUtil.swap(queue,j,k); 27NhYDo
k = j; >,JA=s
} bxS+ R\
} D3>;X=1
private void fixUp(int k) { D<m+M@u
while (k > 1) { D=Pv:)*]
int j = k >> 1; a V4p0s6ZZ
if (queue[j]>queue[k]) u*<G20~A
break; K^_Mt!%
SortUtil.swap(queue,j,k); P2+Z^J`Y>
k = j; h]#wwJF
} 7fOk]Yl[
} tv+H4/
N~%F/`Z<+
} ~alC5|wCUQ
':v@Pr|
} MR/8
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SortUtil： Z{|U!tn
H9^DlIv('
package org.rut.util.algorithm; ;'B\l@U\
~$zodrS9
import org.rut.util.algorithm.support.BubbleSort; Uv-xP(X
import org.rut.util.algorithm.support.HeapSort; p$5+^x'(
import org.rut.util.algorithm.support.ImprovedMergeSort; c 4<~?L
import org.rut.util.algorithm.support.ImprovedQuickSort; K`9ph"(Z
import org.rut.util.algorithm.support.InsertSort; :PrQ]ss@C5
import org.rut.util.algorithm.support.MergeSort; !U@?Va~Zn
import org.rut.util.algorithm.support.QuickSort; E,#J\)'z
import org.rut.util.algorithm.support.SelectionSort; `+!GoXI
import org.rut.util.algorithm.support.ShellSort; M=}vDw]Q
}wJDHgt]-p
/** )7e[o8O_6
* @author treeroot `z=I}6){
* @since 2006-2-2 \?bp^BrI
* @version 1.0 0$n0fu
*/ rSYzrVc
public class SortUtil { ?\QEK
public final static int INSERT = 1; ~ "]6
public final static int BUBBLE = 2; 8%UI<I,
public final static int SELECTION = 3; 2[\I{<2/9
public final static int SHELL = 4; 7DU"QeLeb
public final static int QUICK = 5; 3zO'=gwJ
public final static int IMPROVED_QUICK = 6; 0aMw
public final static int MERGE = 7; +M+ht
public final static int IMPROVED_MERGE = 8; axl!zu*
public final static int HEAP = 9; BVx: JiA
M~/%V NX
public static void sort(int[] data) { 0Wf,SYx`s
sort(data, IMPROVED_QUICK); V01-n{~G
} K#=)]qIk
private static String[] name={ HS|X//]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N{]|!#
}; 4JTFdbx
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private static Sort[] impl=new Sort[]{ %5=XszS
new InsertSort(), DcN s`2
new BubbleSort(), G_wzUk=L
new SelectionSort(), V}#2pP
new ShellSort(), H4HWr6
new QuickSort(), fz`+j -u
new ImprovedQuickSort(), "tgaFtC=w
new MergeSort(), |M?yCo
new ImprovedMergeSort(), =H_|007C
new HeapSort() [TPr
}; (ia(y(=C
{]\QUXH
public static String toString(int algorithm){ =TDK$Ek
return name[algorithm-1]; BfLh%XC
} qY24Y
>Xq:?}-m2
public static void sort(int[] data, int algorithm) { +"!,rZ7,A
impl[algorithm-1].sort(data); _5^p+
} V`KXfY
=OIxG}*
public static interface Sort { Ix,`lFbH
public void sort(int[] data); N#')Qz:P
} Go}C{(4T
I$4GM
public static void swap(int[] data, int i, int j) { _LV;q! /j
int temp = data; =Tf uwhV
data = data[j]; af]&3(33
data[j] = temp; *`:zSnu
} iPMI$
} eKlh }v