[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; `+6R0Ch
} PkI:*\R
int i1=l; )K &(
int i2=mid+1; %p%%~ewmx
for(int cur=l;cur<=r;cur++){ 9tF9T\jW
if(i1==mid+1) jKt7M>P
data[cur]=temp[i2++]; %*BlWk!Q
else if(i2>r) boDt`2=
data[cur]=temp[i1++]; J:V?EE,\-
else if(temp[i1] data[cur]=temp[i1++]; <b,~:9*?
else d!eYqM7-G
data[cur]=temp[i2++]; <&C]sb
} J2:y6kGj>
} 9B;{]c
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} 03C0L&
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改进后的归并排序: (o`{uj{!
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package org.rut.util.algorithm.support; |\pbir
oq}'}`lw"
import org.rut.util.algorithm.SortUtil; 3Z1CWzq(
s{1sE)_
/** Jv^h\~*jH
* @author treeroot ;^Dpl'v%\
* @since 2006-2-2 gEjdN.
* @version 1.0 =>-Rnc@
*/ ]\|VpIg
public class ImprovedMergeSort implements SortUtil.Sort { -B +4+&{T
0Vx.nUQ
private static final int THRESHOLD = 10; a\r\PBi
!r<pmr3f@7
/* =E.wv
* (non-Javadoc) 4<BjC[@~Z{
* E>K!Vrh-L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V:joFRH9
*/ {;2PL^i
public void sort(int[] data) { -fDnA4;
int[] temp=new int[data.length]; hIT+gnhh
mergeSort(data,temp,0,data.length-1); >7 ="8
} i{`:(F5*
n@)K #
private void mergeSort(int[] data, int[] temp, int l, int r) { $` ""
int i, j, k; Hl,W=2N
int mid = (l + r) / 2; vX.VfY
if (l == r) %KLpig
return; #{;k{~;PF
if ((mid - l) >= THRESHOLD) FYpzQ6s~
mergeSort(data, temp, l, mid); x7Yu I
else V-BiF>+
insertSort(data, l, mid - l + 1); m^zUmrj[
if ((r - mid) > THRESHOLD) 6e|*E`I
mergeSort(data, temp, mid + 1, r); HAa;hb
else *}*FX+px)
insertSort(data, mid + 1, r - mid); nlc "c5;jh
p>huRp^w
for (i = l; i <= mid; i++) { $&n=$C&x
temp = data; F1yqxWHeo
} [1S|dc>.O%
for (j = 1; j <= r - mid; j++) { " )1V]}+m
temp[r - j + 1] = data[j + mid]; cz8T
} p^w;kN
int a = temp[l]; lNYt`xp
int b = temp[r]; JJN.ugT}1
for (i = l, j = r, k = l; k <= r; k++) { M<v%CawS
if (a < b) { n"c[,k+R`U
data[k] = temp[i++]; ]Gsv0Xk1
a = temp; {ttysQ-
} else { MDnua
data[k] = temp[j--]; Tw-;7Ae
b = temp[j]; 9dx/hFA
} ;@oN s-
} R\!2l|_
} b0Ps5G\ u
3EPv"f^V
/** p$]3'jw
* @param data 0Qf,@^zL*
* @param l s Z].8.
* @param i Q' {ML4
*/ wfLaRP
private void insertSort(int[] data, int start, int len) { Pd_U7&w,5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kaVxT_
} nksLWfpG?B
} n{argI8wF
} %]}
} t-tg-<
tEvut=k'
堆排序： vN;N/mL
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package org.rut.util.algorithm.support; iu=7O
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import org.rut.util.algorithm.SortUtil; W}@c|d $`
vXrx{5gz
/** KQ% GIz x
* @author treeroot - M4JJV(
* @since 2006-2-2 "o-zy'I
* @version 1.0 Y!w`YYKP
*/ %K=?@M9i
public class HeapSort implements SortUtil.Sort{ R'as0 u\
|4;Fd9q^m
/* (non-Javadoc) U]H#MiC!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bu~]ey1
*/ PR#exm&
public void sort(int[] data) { |"8b_Cq{
MaxHeap h=new MaxHeap(); $w`xvX
h.init(data); Q4#m\KK;i9
for(int i=0;i h.remove(); '}53f2%gKa
System.arraycopy(h.queue,1,data,0,data.length); @<hb6bo,N
} O`IQ(,yef
uP)'FI
private static class MaxHeap{ /|6N*>l)y
P9^Xm6QO
void init(int[] data){ AUG#_HE]k
this.queue=new int[data.length+1]; oM>l#><nq
for(int i=0;i queue[++size]=data; _YhES-Ff
fixUp(size); \h/H#jZJ
} ]nn98y+
} ,aZ[R27rpL
y&$A+peJ1
private int size=0; NZ:,ph
Y.(PiuG$G
private int[] queue; %v M-mbX
Ju@c~Xm
public int get() { EHJ.T~X
return queue[1]; t\dN DS
} :D5Rlfj
L\J;J%fz.
public void remove() { b|:YIXml
SortUtil.swap(queue,1,size--); hn GZ=
fixDown(1); zj{pJOM06
} gD@){Ip
file://fixdown lgL%u K)
private void fixDown(int k) { BA:VPTZq
int j; N)X3XTY
while ((j = k << 1) <= size) { IVY]EkEG~
if (j < size %26amp;%26amp; queue[j] j++; Woym/[i
if (queue[k]>queue[j]) file://不用交换 reu*53r]
break; NIry)'"
SortUtil.swap(queue,j,k); 0 1rK8jX
k = j; Q->sV$^=T
} i>`%TW:g
} Naf0)3q>!
private void fixUp(int k) { v0{i0%d,?
while (k > 1) { W:2( .?
int j = k >> 1; $t[FH&c(
if (queue[j]>queue[k]) 9s q
break; Tx# Mn~xD
SortUtil.swap(queue,j,k); N#_H6TfMG
k = j; `4J$Et%S
} lukB8
} m=:9+z
'o2Fa_|<#
} Dw.J2>uj
m+[Ux{$
} e#8Q L
H/ HMm{4
SortUtil： C ;W"wBz9
lTgjq:mn
package org.rut.util.algorithm; IM'r8V
~q.F<6O
import org.rut.util.algorithm.support.BubbleSort; p8O2Z?\
import org.rut.util.algorithm.support.HeapSort; $7ZX]%<s
import org.rut.util.algorithm.support.ImprovedMergeSort; x|Bf-kc[#Q
import org.rut.util.algorithm.support.ImprovedQuickSort; 1.GQau~
import org.rut.util.algorithm.support.InsertSort; O,f?YJ9S
import org.rut.util.algorithm.support.MergeSort; <iC(`J$D
import org.rut.util.algorithm.support.QuickSort; i-_mTY&M
import org.rut.util.algorithm.support.SelectionSort; M5X&}cN6
import org.rut.util.algorithm.support.ShellSort; %ntRG!
Xc-'Y"}|`t
/** T.BW H2gRP
* @author treeroot A?P_DA
* @since 2006-2-2 r),kDia
* @version 1.0 IOmfF[
*/ .t!x<B
public class SortUtil { +I|vzz`ZVr
public final static int INSERT = 1; KkbDW3-
public final static int BUBBLE = 2; 7Ovi{xd@
public final static int SELECTION = 3; ^jZbo{
public final static int SHELL = 4; \r+ a GB
public final static int QUICK = 5; [RhO$c$[\
public final static int IMPROVED_QUICK = 6; ea 'D td
public final static int MERGE = 7; ^}o2
public final static int IMPROVED_MERGE = 8; ",; H`V
public final static int HEAP = 9; L#sMSVC+
:DNY7TvZ
public static void sort(int[] data) { 0S!K{xyR
sort(data, IMPROVED_QUICK); ,#9PxwrO
} @qAS*3j
private static String[] name={ ;?p>e'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V**~m9f
}; VU3upy<
$<EM+oJ|ER
private static Sort[] impl=new Sort[]{ p_%Rt"!
new InsertSort(), 8(~h"]`!
new BubbleSort(), 2fd{hJDq;5
new SelectionSort(), h*](a_0
new ShellSort(), iqWQ!r^
new QuickSort(), ggR.4&<
new ImprovedQuickSort(), gjDHo$
new MergeSort(), "+G8d'%YV
new ImprovedMergeSort(), xi}skA
new HeapSort() !Wnb|=j
}; z<?)Rq"
fuySN!s
public static String toString(int algorithm){ 2c*GuF9(0
return name[algorithm-1]; BRiE&GzrF
} `X&gE,Ii
/a4{?? #e
public static void sort(int[] data, int algorithm) { 4|DWOQ':
impl[algorithm-1].sort(data); (O3nL.
} -uf|w?
[7Oe3=
public static interface Sort { UP,c|
public void sort(int[] data); %7+qnH*;r
} zK@@p+n_#.
HG^'I+Yn
public static void swap(int[] data, int i, int j) { vXje^>_6
int temp = data; `b$.%S8uj=
data = data[j]; ~Mxvq9vaD
data[j] = temp; VMWf>ZU
} 0@oJFJrO
} ud('0r',D