[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; g.SFl
} )0j^Fq5[+
int i1=l; :+bQPzL
int i2=mid+1; GXYmJ4wR
for(int cur=l;cur<=r;cur++){ [ZZ~^U5
if(i1==mid+1) i`z1if6O
data[cur]=temp[i2++]; ^QpP'
else if(i2>r) PL@hsZty~c
data[cur]=temp[i1++]; ;;2XLkWu
else if(temp[i1] data[cur]=temp[i1++]; A Ns.`S
else K#%L6=t$<
data[cur]=temp[i2++]; lr=? &>MXj
} "|{NRIE
} &-:ZM0Fl
_<6 ^r
} %\6|fKB4<
hxP%m4xF +
改进后的归并排序: 07[A&B!
yAy~|1}
package org.rut.util.algorithm.support; ~pO6C*"
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import org.rut.util.algorithm.SortUtil; !trt]?*-
%YkJA:
/** 6}6;%{p"Gu
* @author treeroot 5z~rl}`v
* @since 2006-2-2 ",!#7h
* @version 1.0 $sTbFY
*/ qsOA(+ZP
public class ImprovedMergeSort implements SortUtil.Sort { Se.\wkl#Y
cY8XA6
private static final int THRESHOLD = 10; EiQX*v
4nK\gXz19
/* /{>$E>N;
* (non-Javadoc) PIR#M('
* b#`XmB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4wjy)VD_
*/ 4y\qJw)~U
public void sort(int[] data) { x' >Nz{B,P
int[] temp=new int[data.length]; Ydm0
mergeSort(data,temp,0,data.length-1); `Fnl<C<
} [EI~/#;
KJn@2x6LP
private void mergeSort(int[] data, int[] temp, int l, int r) { s~ ||Vv!
int i, j, k; v%v(-, _q
int mid = (l + r) / 2; O#LG$Y n*
if (l == r) a~q_2S]h
return; l/1u>'
if ((mid - l) >= THRESHOLD) q.0Evr:
mergeSort(data, temp, l, mid); ,I6jfXI4
else Q6blX6DWU
insertSort(data, l, mid - l + 1); c%y(Z5
if ((r - mid) > THRESHOLD) 1P4cBw%
mergeSort(data, temp, mid + 1, r); ZByxC*Cz
else 7k,pUC-w7c
insertSort(data, mid + 1, r - mid); \ #<.&`8B
-#<6
for (i = l; i <= mid; i++) { DJ_[{WAV
temp = data; YnM&t ;TX
} :rxS&5
for (j = 1; j <= r - mid; j++) { O[}{$NXw
temp[r - j + 1] = data[j + mid]; %+ln_lgD:
} mJ+M|#Ox
int a = temp[l]; J]&^A$
int b = temp[r]; 0s9-`nHen|
for (i = l, j = r, k = l; k <= r; k++) { #IJm*_J<
if (a < b) { +kA>^
data[k] = temp[i++]; \^o8qw'pt
a = temp; bn7"!6
} else { ~6{iQZa1Y
data[k] = temp[j--]; OBb m?`[
b = temp[j]; Cws;6i*=@
} 1Vf?Rw
} d]A.=NAc
} F}1h
^}SP,lg'
/** ;x<5F+b
* @param data vCvjb\S
* @param l ak,KHA6u
* @param i .lsD+}
*/ )Ehi8
private void insertSort(int[] data, int start, int len) { vYFtw L`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u+/Uc:XK)
} In[rxT~K}Q
} Pj-.oS2dA
} $-D}y:
} jz,K>
=Bg $OX
堆排序： 8H'ybfed
oACbZ#/@n
package org.rut.util.algorithm.support; ?"F9~vx&G
L@5sY0 M
import org.rut.util.algorithm.SortUtil; kzE<Y
Ln'y 3~@
/** tJG+k)EE
* @author treeroot ^4b;rLfk@
* @since 2006-2-2 ) $`}~
* @version 1.0 gt(^9t;
*/ mEm=SpO[$o
public class HeapSort implements SortUtil.Sort{ |}7!'f\M
X-=4Z9
/* (non-Javadoc) M(^_/1Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hW!2C6
*/ eJ*u]GH U
public void sort(int[] data) { .5"s[(S
MaxHeap h=new MaxHeap(); oVTXn=cYDp
h.init(data); tj?%{L
for(int i=0;i h.remove(); T@Bu Fr`]<
System.arraycopy(h.queue,1,data,0,data.length); {Gr"lOi*@
} cP",szcY
3PjX;U|
private static class MaxHeap{ \0W0o5c$
PNz]L
void init(int[] data){ qeW.~B!B
this.queue=new int[data.length+1]; P BVF'~f@j
for(int i=0;i queue[++size]=data; 86pA+c+U
fixUp(size); .L9g*q/}
} naro
} 5hHLC7tT9
4(91T
private int size=0; o}&{Y2!x
eslvg#Q
private int[] queue; K'}I?H~P_
YQ@2p?4m
public int get() { nQOzKw<j%
return queue[1]; Ma'#5)D
} r#A*{4wz
y"Pd>61h
public void remove() { f|=u{6
SortUtil.swap(queue,1,size--); m^\&v0
fixDown(1); y^e3Gyk
} 9Trk&OB
file://fixdown 2z.~K&+x
private void fixDown(int k) { \#PZZH%
int j; v8WT?%
while ((j = k << 1) <= size) { (&1.!R[X
if (j < size %26amp;%26amp; queue[j] j++; NiFe#SLA
if (queue[k]>queue[j]) file://不用交换 rq^%)tR
break; j7^A%9
SortUtil.swap(queue,j,k); !MrQ-B(
k = j; '7pzw>E=:
} o%f:BJS
} )"?eug}D
private void fixUp(int k) { cRMyYdJ o
while (k > 1) { F\hVunPVx
int j = k >> 1; DSRmFxkk
if (queue[j]>queue[k]) A|,qjiEJCc
break; _-sFJi8B
SortUtil.swap(queue,j,k); >gs_Bzy]
k = j; ZqdoYU'
} gTgoS:M"_O
} ]kXWeY<
`a:3S@n(}
} yf;TIh%)=
Gov.;hy
} o ^ \+Ua
Kj"X!-
SortUtil： }zS5o [OE
SB08-G2
package org.rut.util.algorithm; $_,-ESI
@ZjO#%Ep/
import org.rut.util.algorithm.support.BubbleSort; 6bc\ )n`
import org.rut.util.algorithm.support.HeapSort; t,dm3+R
import org.rut.util.algorithm.support.ImprovedMergeSort; 6D[]Jf,9
import org.rut.util.algorithm.support.ImprovedQuickSort; }vh4ix
import org.rut.util.algorithm.support.InsertSort; dWQB1Y*N
import org.rut.util.algorithm.support.MergeSort; P[-do
import org.rut.util.algorithm.support.QuickSort; dHTx^1
import org.rut.util.algorithm.support.SelectionSort; WR`NISSp
import org.rut.util.algorithm.support.ShellSort; fN&uat7
}#u #m.
/** 5y 5Dn!`
* @author treeroot ,~&HL7v
* @since 2006-2-2 \v6lcAL-
* @version 1.0 i\l}M]Z#
*/ W7b m}JHn
public class SortUtil { ~@Q]@8Tv\
public final static int INSERT = 1; Vs{\ YfF
public final static int BUBBLE = 2; M2w'cdHk
public final static int SELECTION = 3; 0^dYu/i5
public final static int SHELL = 4; ;3wO1'=
public final static int QUICK = 5; @tY]=pqn_
public final static int IMPROVED_QUICK = 6; 4oH ,_sr
public final static int MERGE = 7; D*[Jrq,
public final static int IMPROVED_MERGE = 8; 9M3"'^ {$
public final static int HEAP = 9; @!'}=?`
nDXEm6|e
public static void sort(int[] data) { GF8wKx#J
sort(data, IMPROVED_QUICK); ^g|cRI_"
} 'sH_^{V2
private static String[] name={ T}=^D=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {ri={p]l
}; A]5];c
Xpn\TD<_I
private static Sort[] impl=new Sort[]{ {4,],0bjx/
new InsertSort(), j}",+Hv
new BubbleSort(), dd<l;4(
new SelectionSort(), 9$z$yGjl
new ShellSort(), D?"P\b[/
new QuickSort(), ltDohm?
new ImprovedQuickSort(), abT,"a\h
new MergeSort(), 85H\v_[
new ImprovedMergeSort(), @-Ql6k
new HeapSort() ?.%dQ0
}; OVDuF&0
8$A0q%n
public static String toString(int algorithm){ T\bP8D
return name[algorithm-1]; Zs=A<[
} QwWd"Of
I2}eFz&FE
public static void sort(int[] data, int algorithm) { {~&Q"8 }G
impl[algorithm-1].sort(data); y42Cg
} fxPg"R!1i
C'|9nK$%
public static interface Sort { ,P`NtTN-
public void sort(int[] data); ./k7""4
} dGBjV #bNT
A8vd@0
public static void swap(int[] data, int i, int j) { v;o1c44;
int temp = data; oH%[8!#
data = data[j]; b|Emu!9U
data[j] = temp; G]f|?
} xt?-X%oY8
} +|obU9M