[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; /6g*WX2P1
} 5<9}{X+@o
int i1=l; od!TwGX
int i2=mid+1; 7&2xUcsz)
for(int cur=l;cur<=r;cur++){ Dzb@H$BQ7
if(i1==mid+1) ="MG>4j3.F
data[cur]=temp[i2++]; zvE]4}VL?
else if(i2>r) n{|~x":9V
data[cur]=temp[i1++]; "@.hz@>
else if(temp[i1] data[cur]=temp[i1++]; Yf|+p65g
else Xq9%{'9
data[cur]=temp[i2++]; fy7]I?vm@
} od$Cm5
} I/t2c=f
~|riFp=J
} 0&zp9(G5
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改进后的归并排序: -GQ`n01
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package org.rut.util.algorithm.support; wTqgH@rGtR
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import org.rut.util.algorithm.SortUtil; *&!&Y*Jzg
MK,#"Ty}zK
/** FK>8(M/
* @author treeroot TtlZum\
* @since 2006-2-2 uPt({H
* @version 1.0 tK1P7pbC8r
*/ j%0D:jOY]
public class ImprovedMergeSort implements SortUtil.Sort { PU[] Nw
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private static final int THRESHOLD = 10; [/\}:#MLe
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/* EQ\/I( =l
* (non-Javadoc) =56O-l7T*w
* ELPzqBI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5!-'~W
*/ ZE#A?5lb
public void sort(int[] data) { /aNlr>^
int[] temp=new int[data.length]; sZA7)Z`7
mergeSort(data,temp,0,data.length-1); L~=h?C<
} c#Y/?F2p
F{v>
private void mergeSort(int[] data, int[] temp, int l, int r) { J.35Ad1hM
int i, j, k; ]9F$/M#
int mid = (l + r) / 2; xbsp[0I,
if (l == r) 9n%vz@X
return; Gg8F>y<[R
if ((mid - l) >= THRESHOLD) l*^c?lp)
mergeSort(data, temp, l, mid); .liVlo@
else YH@p\#Y
insertSort(data, l, mid - l + 1); <BEM`2B
if ((r - mid) > THRESHOLD) /{|JQ'gqX
mergeSort(data, temp, mid + 1, r); ,'Zs")Ydp
else V\vt!wBcB
insertSort(data, mid + 1, r - mid); IZn|1X?}\s
IN~Q(A]Z%
for (i = l; i <= mid; i++) { 7a\at)q/y
temp = data; [2ez"4e
} Ia %> c
for (j = 1; j <= r - mid; j++) { ,=jwQG4wq
temp[r - j + 1] = data[j + mid]; i_Ol vuy~
} ~U}0=lRVS
int a = temp[l]; a'r8J~:jy
int b = temp[r]; usc"m huQ
for (i = l, j = r, k = l; k <= r; k++) { n|q$=jE
if (a < b) { %=e^MN1
data[k] = temp[i++]; Z4KYVHD,
a = temp; =^3 Z L
} else { OiI29
data[k] = temp[j--]; %m)vQ\Vtx
b = temp[j]; *sz:c3{_
} |$
} V(wm?Cc]
} Z}$wvd
~T">)Y~+xI
/** (J}tCqP
* @param data E?v:7p<
* @param l /3#)
* @param i K-<<s
*/ #:[^T,YD0
private void insertSort(int[] data, int start, int len) { q|h#J}\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x`n7D
} +@G#Z3;l!
} (}*1,N!#
} M$,4B
} AO[/-Uij
djmd @{Djt
堆排序： (_IPz)F
Z@(m.&ZRx
package org.rut.util.algorithm.support; ((Uw[8#2`
7fE U5@
import org.rut.util.algorithm.SortUtil; {?X:?M_
y8%QS*
/** tK7v&[cI
* @author treeroot wjy<{I
* @since 2006-2-2 ]Ub"NLYV
* @version 1.0 0H!J
*/ -RI&uFqOI
public class HeapSort implements SortUtil.Sort{ :yxP3e%rp
b,hRk1
/* (non-Javadoc) xlIVLv6dO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dj-/%MU
*/ *jCHv
public void sort(int[] data) { &a8%j+j
MaxHeap h=new MaxHeap(); zt!)7HBo
h.init(data); =W[M=_0u
for(int i=0;i h.remove(); JIatRc?g
System.arraycopy(h.queue,1,data,0,data.length); !(A<
} gkhmQd
,76Q*p
private static class MaxHeap{ ?uh%WN6nU]
=[do([A
void init(int[] data){ aE(DNeG-H
this.queue=new int[data.length+1]; %_(Xn
for(int i=0;i queue[++size]=data; ;.+C
fixUp(size); ,Jrm85oG
} {iXQUj
} )6b`1o!7
0g'MFS
private int size=0; 6qR5A+|;
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private int[] queue; pN=>q<]L
bt=z6*C>A
public int get() { yRy^'E~
return queue[1]; Uc<BLu;
} \ v2-}jU(
^^z_[Ih
public void remove() { `|p8zV
SortUtil.swap(queue,1,size--); j6GR-WQ]t
fixDown(1); p}]K0F!
} 0u}+n+\g
file://fixdown sq_ yu(
private void fixDown(int k) { eNDc220b
int j; "N3!!3
while ((j = k << 1) <= size) { TUN6`/"
if (j < size %26amp;%26amp; queue[j] j++; O[+\` 63F=
if (queue[k]>queue[j]) file://不用交换 vyBx|TR
break; eWOZC(I*z
SortUtil.swap(queue,j,k); v8U&{pD,
k = j; d1}cXSQ1T
} >)t-Zh:n
} |U`ASo
private void fixUp(int k) { ST1;i5
while (k > 1) { >@tJ7mM
int j = k >> 1; &SMM<^P.
if (queue[j]>queue[k]) $Zn>W@\
break; :Qu.CvYF
SortUtil.swap(queue,j,k); .efbORp
k = j; ~,m5dP#[bV
} ?$@E}t8g\
} 8;i'dF:)
Dc9Fb^]QOG
} =AP0{
[{PmU~RMYf
} Iuve~ugO
3Vk<hBw2
SortUtil： xzw2~(lo
0zpA<"S
package org.rut.util.algorithm; b"(bT6XO!
$Yj4&Two<
import org.rut.util.algorithm.support.BubbleSort; *5mJA -[B+
import org.rut.util.algorithm.support.HeapSort; T5eJIc3a"
import org.rut.util.algorithm.support.ImprovedMergeSort; H,(4a2zx
import org.rut.util.algorithm.support.ImprovedQuickSort; LHMA-0$?)
import org.rut.util.algorithm.support.InsertSort; u}-)ywX
import org.rut.util.algorithm.support.MergeSort; v*&WqVg
import org.rut.util.algorithm.support.QuickSort; Va$JfWef
import org.rut.util.algorithm.support.SelectionSort; s+9b.
import org.rut.util.algorithm.support.ShellSort; 0Wb3M"#9<
YK V"bI
/** yK>s]65&
* @author treeroot >mMmc!u>G
* @since 2006-2-2 V9;O1
* @version 1.0 ;F:Qz^=.a
*/ ejpSbVJ
public class SortUtil { Bgs,6:
public final static int INSERT = 1; ~}Z'/zCZf
public final static int BUBBLE = 2; r12e26_Ab
public final static int SELECTION = 3; 2{01i)2y
public final static int SHELL = 4; oz'^.+uvE
public final static int QUICK = 5; m }\L i]
public final static int IMPROVED_QUICK = 6; MC_i"P6a
public final static int MERGE = 7; ]GiDfYs7%
public final static int IMPROVED_MERGE = 8; K 5AArI
public final static int HEAP = 9; Ym wb2]M
=k2"1f~e
public static void sort(int[] data) { s x)x7
sort(data, IMPROVED_QUICK); tC&jzN"
} |DUOyQ
private static String[] name={ nm`}Z'&)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WYW@%t
}; 9R N ge;*
KV|ywcGhT
private static Sort[] impl=new Sort[]{ d[&Ah~,
new InsertSort(), kOV6O?h
new BubbleSort(), ;'oi7b
new SelectionSort(), $ItPUYi";
new ShellSort(), oN[#C>#(
new QuickSort(), y*j8OA.S
new ImprovedQuickSort(), 78O5$?b;#
new MergeSort(), *oru;=D@8
new ImprovedMergeSort(), H8$";T(I
new HeapSort() |"Fm<
}; QD^"cPC)mM
t_iZ\_8
public static String toString(int algorithm){ ~p$ncIr2Q
return name[algorithm-1]; W4S]2P>T
} 9|2LuHQu+
~c'R7E&Bfa
public static void sort(int[] data, int algorithm) { eQsoZQA1
impl[algorithm-1].sort(data); ixJwv\6Y
} m@y_Wt
4(p,@e31
public static interface Sort { :snn-e0l
public void sort(int[] data); }>m3V2>[
} *Vp$#Rb
D}K/5iU]a
public static void swap(int[] data, int i, int j) { lPn&,\9@~
int temp = data; V5]:^=
data = data[j]; ^jg{MTa
data[j] = temp; dMoN19F
} *Bx'g| u
} o88Dz}a