[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; v*L '{3f
} $-w5o`e
int i1=l; #`j][F@N
int i2=mid+1; m"-G6BKS
for(int cur=l;cur<=r;cur++){ GYqJ!,
if(i1==mid+1) g8Aj `O
data[cur]=temp[i2++]; (rMZ
else if(i2>r) 1NGyaI
data[cur]=temp[i1++]; !Mil?^
else if(temp[i1] data[cur]=temp[i1++]; yiO31uQt
else b_ JWnh
data[cur]=temp[i2++]; bs:QG1*.
} irmwc'n]
} lWlUWhLnP
5Jw"{V?Ak
} l4Y1(
k.{G&]r{
改进后的归并排序: LT(?#)D
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package org.rut.util.algorithm.support; Mz}i[|U\
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import org.rut.util.algorithm.SortUtil; )rbc;{.
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/** c85O_J
* @author treeroot 2mq%|VG'
* @since 2006-2-2 X}?ESjZJ
* @version 1.0 uOb2npPj
*/ dh?S[|='
public class ImprovedMergeSort implements SortUtil.Sort { 8L{$v~+
,0.|P`|w
private static final int THRESHOLD = 10; 3z$HKG
>&[3
/* i&1U4q
* (non-Javadoc) :SQLfOQ
* .&L^J&V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W'd/dKUx
*/ CHg]Ul
public void sort(int[] data) { 9g4QVo|
int[] temp=new int[data.length]; ,?fN#gc :
mergeSort(data,temp,0,data.length-1); Kj=;>u
} sD.6"w7}
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private void mergeSort(int[] data, int[] temp, int l, int r) { CR.bMF}
int i, j, k; oAC^4-Ld
int mid = (l + r) / 2; $xQ"PJ2
if (l == r) GU5W|bS
return; :"y0oCu7`W
if ((mid - l) >= THRESHOLD) B6(h7~0(<
mergeSort(data, temp, l, mid); *|@+rbjVC
else \N4d_fPj
insertSort(data, l, mid - l + 1); ,v|CombIc.
if ((r - mid) > THRESHOLD) 7<fL[2-
mergeSort(data, temp, mid + 1, r); exsQmbj* %
else #fO*ROe
insertSort(data, mid + 1, r - mid); 8>2&h
HqB|SWyK
for (i = l; i <= mid; i++) { z( *]'Y
temp = data; +tPx0>p;
} p|b+I"M
for (j = 1; j <= r - mid; j++) { P4i3y{$V
temp[r - j + 1] = data[j + mid]; ~@[(U!G
} `B:B7Cpvn
int a = temp[l]; _`slkwP.
int b = temp[r]; #"|"cYi,
for (i = l, j = r, k = l; k <= r; k++) { 4n#YDZ
if (a < b) { _r~!O$2
data[k] = temp[i++]; 5XI;<^n2
a = temp; 4c
} else { v/]Qq
data[k] = temp[j--]; zoJ_=- *s
b = temp[j]; Nvi Fq
} 2%`^(\y
} F\zkyk4
} z|Hy>|+
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/** bcUC4g\9N
* @param data >0kmRVd
* @param l 83\o(
* @param i U? {'n#n 5
*/ @][ a8:Y9I
private void insertSort(int[] data, int start, int len) { M' a&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e 4 p*51ra
} sM#!Xl;
} hN Z4v/
} x-w`KFS
} R.91v4J
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堆排序： S`ax*`
i_[^s:*T
package org.rut.util.algorithm.support; *?EO n-
;% /6Y~/
import org.rut.util.algorithm.SortUtil; x>U1t!'
4 *Bp
/** D?iy.Dg
* @author treeroot jl;kcGE
* @since 2006-2-2 >{phyByI
* @version 1.0 "Czz,;0
*/ #citwMW
public class HeapSort implements SortUtil.Sort{ X_vI0YX9
9 Q0#We*
/* (non-Javadoc) Z}sG3p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N>uA|<b,
*/ ~C}(\8g
public void sort(int[] data) { f28gE7Y\a
MaxHeap h=new MaxHeap(); 9\AEyaJFZ
h.init(data); p2pTs&}S
for(int i=0;i h.remove(); C1ZFA![
System.arraycopy(h.queue,1,data,0,data.length); -&qRo0^3
} 4]Un=?)I
P@gu~!
private static class MaxHeap{ Qh)|FQ[s$r
wJapGc!
void init(int[] data){ ^2&O3s
this.queue=new int[data.length+1]; s[0prm5.
for(int i=0;i queue[++size]=data; <7vIh0
fixUp(size); Ma`
} xTa4.ZXg
} K$Mx}m7l
^BF@j4*~
private int size=0; #Pb7EL#c
.fio<mqi
private int[] queue; gp#bQ
q#mFN/.(+
public int get() { . 1{vpX
return queue[1]; M9uH&CD6U
} fl pXVtsQ
zPX=MfF
public void remove() { e.3sAUHZ-
SortUtil.swap(queue,1,size--); ?:#>^eWYe7
fixDown(1); )z?&"I
} %0ll4"
file://fixdown `@u+u0
private void fixDown(int k) { XPc9z}/(e
int j; beN>5coP%A
while ((j = k << 1) <= size) { SXHru Z
if (j < size %26amp;%26amp; queue[j] j++; b6LC$"t0
if (queue[k]>queue[j]) file://不用交换 6T{o3wc;
break; +WV_`Rx#
SortUtil.swap(queue,j,k); wzNt c)~i
k = j; 1cHSgpoJ
} "6I-]:K-
} T!=20!I
private void fixUp(int k) { #VQGN2bK.
while (k > 1) { =0@d|LeZ
int j = k >> 1; 3]:p!Y`$
if (queue[j]>queue[k]) g|GvJ)VX
break; c{]r{FAx9o
SortUtil.swap(queue,j,k); l ))~&
k = j; x8SM,2ud
} :oon}_MdRd
} vUo.BA#;.b
2-cU -i4
} `aO@N(
j &0fC!k
} N:PA/V^z
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SortUtil： '1kj:Np
+AgkPMy
package org.rut.util.algorithm; <u x*r#a!d
Fl#VKU3h
import org.rut.util.algorithm.support.BubbleSort; ?|Q5]rhs
import org.rut.util.algorithm.support.HeapSort; 'sjJSc
import org.rut.util.algorithm.support.ImprovedMergeSort; Pw^c2TQ
import org.rut.util.algorithm.support.ImprovedQuickSort; Zs3]|bUR
import org.rut.util.algorithm.support.InsertSort; %_j?<h&
import org.rut.util.algorithm.support.MergeSort; 7&RJDa:a7T
import org.rut.util.algorithm.support.QuickSort; o$HJg
import org.rut.util.algorithm.support.SelectionSort; mP5d!+[8
import org.rut.util.algorithm.support.ShellSort; Sf4h!ly
aoakTi!}
/** 08K.\3
* @author treeroot V'.eesN
* @since 2006-2-2 yqVaA 'w5
* @version 1.0 <R`,zE@t'(
*/ +,F= -
public class SortUtil { iu6WGmR
public final static int INSERT = 1; Wf`OyeRz
public final static int BUBBLE = 2; #*>7X>,J
public final static int SELECTION = 3; ?%za:{
public final static int SHELL = 4; z)<pqN
public final static int QUICK = 5; !s[j1=y
public final static int IMPROVED_QUICK = 6; Kz3h]/A.
public final static int MERGE = 7; Y9H *S*n
public final static int IMPROVED_MERGE = 8; MMxoKL
public final static int HEAP = 9; O%++0k;
ZoNNM4M+
public static void sort(int[] data) { dl7p1Cr
sort(data, IMPROVED_QUICK); &;@b&p+
} ".Deu|>
private static String[] name={ &PQ{e8w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J\dhi{0
}; K}5$;W#
4}_w4@(
private static Sort[] impl=new Sort[]{ xBI"{nGoN
new InsertSort(), Y^*$PED?
new BubbleSort(), "za*$DU
new SelectionSort(), ?j4,^K3
new ShellSort(), e2hk
new QuickSort(), /=Uv
new ImprovedQuickSort(), c;~Llj P
new MergeSort(), ^%*{:0'
new ImprovedMergeSort(), %wjU^Urya
new HeapSort() /wxxcq
}; {R{%Z
IwgAA)H
public static String toString(int algorithm){ (27F
return name[algorithm-1]; CIik@O*
} Y'a(J7
f s"V'E2a
public static void sort(int[] data, int algorithm) { 1d@^,7MF-
impl[algorithm-1].sort(data); %{VI-CQ
} yYg&'3
OB i!fLa
public static interface Sort { @ H`QLm
public void sort(int[] data); R?9Plzt5
} 8^"|-~#<
36Z`.E>~L
public static void swap(int[] data, int i, int j) { 9B;Sk]y
int temp = data; AO7qs:+
data = data[j]; JK8@J9(#
data[j] = temp; <$3nD b-
} V_d%g<n4
} W%XS0k}x