[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; K32eZv`T7
} QFX|ZsmK
int i1=l; J~c]9t
int i2=mid+1; <D&75C#
for(int cur=l;cur<=r;cur++){ ?d_<S0j-)
if(i1==mid+1) aP"i_!\.aa
data[cur]=temp[i2++]; q07rWPM "e
else if(i2>r) L`Qiu@
data[cur]=temp[i1++]; L G=Q
else if(temp[i1] data[cur]=temp[i1++]; @]2cL
else Crww\#E;
data[cur]=temp[i2++]; fF *a/\h %
} BA-n+WCWJ
} d]@9kG
0K#dWc}"a
} iqOd]H]v
rH-_L&
改进后的归并排序: kkd<CEz2IM
xX|-5cM;
package org.rut.util.algorithm.support; Jwa2Y0
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import org.rut.util.algorithm.SortUtil; /ox}l<ha
'4O1Y0K
/** 3}N:oJI$z
* @author treeroot Kt`0vwkjvI
* @since 2006-2-2 E~N}m7kTl/
* @version 1.0 ^8fO3<Jg
*/ T.K$a\/{,
public class ImprovedMergeSort implements SortUtil.Sort { Ex<-<tY
kB :")$
private static final int THRESHOLD = 10; fx_7B (
VBd.5YW
/* ?[T&y ,ln
* (non-Javadoc) Z~]17{x0
* zL7+HY*3o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) | @mZ]`p
*/ ap=M$9L'
public void sort(int[] data) { gbSZ- ej
int[] temp=new int[data.length]; wk-ziw
mergeSort(data,temp,0,data.length-1); H"n"Q:Yp
} Llg[YBJ7>
{v2Q7ZO-
private void mergeSort(int[] data, int[] temp, int l, int r) { sRYFu%
int i, j, k; =o5hD,>e
int mid = (l + r) / 2; l(<o,Uv[`
if (l == r) `aSz"4Wd
return; Ag?@fuk$J
if ((mid - l) >= THRESHOLD) y~W6DL}
mergeSort(data, temp, l, mid); e`C'5`d]
else Bj\0RmVa1
insertSort(data, l, mid - l + 1); %tpt+N?
if ((r - mid) > THRESHOLD) IcaF4#
mergeSort(data, temp, mid + 1, r); #_Tceq5
else 3RGVH,
insertSort(data, mid + 1, r - mid); D5U\~'{L
ogQbST
for (i = l; i <= mid; i++) { 4}=]QQoE
temp = data; P'FI'2cN7
} M%6{A+(
for (j = 1; j <= r - mid; j++) { u2BVQ<SA
temp[r - j + 1] = data[j + mid]; B8C"i%8V)
} ZpWG
int a = temp[l]; +]I7)
int b = temp[r]; Y&+<'FA
for (i = l, j = r, k = l; k <= r; k++) { C' ny 2>uA
if (a < b) { R%b,RH#
data[k] = temp[i++]; Z*`CK^^~
a = temp; W\X51DrEx
} else { 9C`Fd S
data[k] = temp[j--]; L$Ss]Ar=
b = temp[j]; +mH Kk
} f? ko%c_p
} *<BasP
} XhTp'2,]
~>+}(%<,
/** 0y6nMI
* @param data 2MJ0[9
* @param l J *^|ojX
* @param i yyBfLPXZ
*/ 18|H
private void insertSort(int[] data, int start, int len) { oIf-s[uH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <5q:mG88
} X $cW!a
} U3p=H^MB.
} "iOT14J!7
} DJ=miJI'
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堆排序： =Y /
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package org.rut.util.algorithm.support; k>2 xm
w^P4_Yr[T
import org.rut.util.algorithm.SortUtil; 0M:.Jhp
jh}[7M
/** 'w!Hjq]$
* @author treeroot O/0m|~`iY
* @since 2006-2-2 + PGfQN
* @version 1.0 lE%0ifu
*/ 22(0Jb\_
public class HeapSort implements SortUtil.Sort{ '{Iv?gh"
g+)T\_#u
/* (non-Javadoc) 54tpR6%3p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N}zQ)]xz+r
*/ lq+FH&
public void sort(int[] data) { '7wWdq
MaxHeap h=new MaxHeap(); ,AACE7%l
h.init(data); JCS$Tm6y<_
for(int i=0;i h.remove(); Vb0hlJb
System.arraycopy(h.queue,1,data,0,data.length); OTalR;:]r
} ^Cpvh}1#
z\Qg 3BS
private static class MaxHeap{ 2NI3&;{4
idGM%Faur
void init(int[] data){ K4A=lD+
this.queue=new int[data.length+1]; !QP~#a%
for(int i=0;i queue[++size]=data; o;-)84Aa
fixUp(size); eK4\v:oG1
} [T !#s
} Q9?/)&3Bu
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private int size=0; :`oYD
+9,"ne1'e
private int[] queue; 0xZq?9a
mu|#(u
public int get() { G#n27y nh
return queue[1]; Bd)Qz(>rw
} ?%B%[u
ZZ?=^g
public void remove() { e9"<.:&
SortUtil.swap(queue,1,size--); d-39G*;1
fixDown(1); \jZvP`.2
} ^!N_Nx/M
file://fixdown 6z!?U:bT
private void fixDown(int k) { Zwp*JH+G
int j; V$<og
while ((j = k << 1) <= size) { C$ nT&06o
if (j < size %26amp;%26amp; queue[j] j++; F8>Fp"
if (queue[k]>queue[j]) file://不用交换 =Tb~CT=
break; ?$ o9/9w
SortUtil.swap(queue,j,k); TfVB~"&
k = j; uu]<R@!J
} }-YD_Pm K-
} 5\RKT)%X
private void fixUp(int k) { )!){4c/
while (k > 1) { WE68a!6
int j = k >> 1; 9`QWqu[
if (queue[j]>queue[k]) V5%B,.d:
break; cm]8m_!
SortUtil.swap(queue,j,k); B,,f$h!
k = j; i wQ'=M
} Y }Rx`%X
} q_']i6
.6f %"E,
} .B_)w:oF
3($%AGKJ
} :Y~fPke
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SortUtil： Z/6B[,V
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package org.rut.util.algorithm; ]X;Ty\UD&
_U%!&_m6
import org.rut.util.algorithm.support.BubbleSort; `A$yF38!
import org.rut.util.algorithm.support.HeapSort; dX,2cK[aG
import org.rut.util.algorithm.support.ImprovedMergeSort; lMFj"x\
import org.rut.util.algorithm.support.ImprovedQuickSort; ??ah
import org.rut.util.algorithm.support.InsertSort; d,6 Z
import org.rut.util.algorithm.support.MergeSort; vw>O;u.]B
import org.rut.util.algorithm.support.QuickSort; 4Z1-RS
import org.rut.util.algorithm.support.SelectionSort; N-4LdC
import org.rut.util.algorithm.support.ShellSort; P ;PS+S9
R0, Q`
/** 8yA:C
* @author treeroot Tg)Fr)
* @since 2006-2-2 1E=%:?d
* @version 1.0 3RZP 12x
*/ s>76?Q:i
public class SortUtil { Qte=<Z)
public final static int INSERT = 1; %}x/fq
public final static int BUBBLE = 2; r,!7TuBl
public final static int SELECTION = 3; B&+V%~/
public final static int SHELL = 4; OjJKloy'
public final static int QUICK = 5; #rF|X6P
public final static int IMPROVED_QUICK = 6; N9Y,%lQ|B8
public final static int MERGE = 7; w<.{(1:v
public final static int IMPROVED_MERGE = 8; `GUj.+u
public final static int HEAP = 9; uhbo/7d'7
!2>gC"$nv
public static void sort(int[] data) { |9{l8`9}_
sort(data, IMPROVED_QUICK); W5<1@
} Etg'"d@[
private static String[] name={ >-c;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v|<Dc8i+
}; 71mdU6Kq
blk~r0.2
private static Sort[] impl=new Sort[]{ :L&-
new InsertSort(), LoPWho[8
new BubbleSort(), 3)Wi? -
new SelectionSort(), 7-nwfp&|$
new ShellSort(), ,H'O`oV!1E
new QuickSort(), & 2& K9R
new ImprovedQuickSort(), o{(-jhR
new MergeSort(), Z; r}Gm
new ImprovedMergeSort(), ?9i 7w1`
new HeapSort() sX^m1v~N|
}; RYZh"1S;k
pMHY2t
public static String toString(int algorithm){ V+W,#5
return name[algorithm-1]; 1b-4wonQd
} %AF~Ki
&JVe-.
public static void sort(int[] data, int algorithm) { C(Yk-7
impl[algorithm-1].sort(data); APsd^J
} P"cc$lB~I
hS OAjS
public static interface Sort { #O7|&DqF{
public void sort(int[] data); &|LZ%W0Fb
} cP`o?:
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public static void swap(int[] data, int i, int j) { =iB0ak
int temp = data; Q>cLGdzO
data = data[j]; J'sVT{@GS
data[j] = temp; ^!3Sz1
} k$9oUE,
} N0,.cd]y`