[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; Q\!0V@$
} KX|7mr90K
int i1=l; qaj~q(j~C
int i2=mid+1; xn=/SIS
for(int cur=l;cur<=r;cur++){ qYwEPGa\
if(i1==mid+1) L#\!0YW/@
data[cur]=temp[i2++]; [r)Hm/_=|U
else if(i2>r) oD@~wcMIT0
data[cur]=temp[i1++]; C2Pw;iK_t
else if(temp[i1] data[cur]=temp[i1++]; YNRorE
else szDd!(&pv
data[cur]=temp[i2++]; 3T<aGW1
} &4m\``//9
} 03{pxI
(|*CVI;
} ,[Bv\4Ah
'f?=ks<
改进后的归并排序: /W vgC)
jMH=lQ+8
package org.rut.util.algorithm.support; U6B-{l:W
zx(=ArCRr
import org.rut.util.algorithm.SortUtil; 3=)!9;uY
z-Ndv;:
/** @5C!`:f
* @author treeroot `L. kyL
* @since 2006-2-2 j3J\%7^i
* @version 1.0 >@mvb@4*
*/ R)<PCe`vf
public class ImprovedMergeSort implements SortUtil.Sort { ?FRuuAS
wB~5&:]jr
private static final int THRESHOLD = 10; ?JinX'z
Q)$RE{*-
/* "s6\l~+9l
* (non-Javadoc) =MsQ=:ZV
* P>i!f!o*I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BwpSw\\?@
*/ 5g-AB`6T
public void sort(int[] data) { {tN?)~ZQ
int[] temp=new int[data.length]; BSMM3jXb
mergeSort(data,temp,0,data.length-1); @C?.)#
} v{T%`WuPRf
&.ilku/
private void mergeSort(int[] data, int[] temp, int l, int r) { 4fq:W`9sN
int i, j, k; !I8m(axW
int mid = (l + r) / 2; <uYeev%
if (l == r) Y]33:c_;Mo
return; (:spA5
if ((mid - l) >= THRESHOLD) G 5T{*
mergeSort(data, temp, l, mid); /4!.G#DLQ
else [\rnJ lE
insertSort(data, l, mid - l + 1); 3rUuRsXn
if ((r - mid) > THRESHOLD) [2 yxTK
mergeSort(data, temp, mid + 1, r); bh~"LQS1
else H E'1Wa0r
insertSort(data, mid + 1, r - mid); ,ezC}V0M
\a}_=O
for (i = l; i <= mid; i++) { q5UD!&W
temp = data; b)e';M
} ^s;xLGl]
for (j = 1; j <= r - mid; j++) { AB1.l hR
temp[r - j + 1] = data[j + mid]; V(5=-8k
} G)S(a4
int a = temp[l]; cj5;XK
int b = temp[r]; =rB=! ;
for (i = l, j = r, k = l; k <= r; k++) { JR_s-&GaM
if (a < b) { I/&uiC{l@
data[k] = temp[i++]; Ol@ssm
a = temp; 9eh9@~mU"l
} else { H({Y
data[k] = temp[j--]; l?rT_uO4
b = temp[j]; nB+UxU@
} ~dm/U7B:
} n_qDg
} ,o{|W9
@#?w>38y
/** 1vG]-T3VC
* @param data O*:8gu'Y2
* @param l %dN',
* @param i CB1AL]|3
*/ DJu&l
private void insertSort(int[] data, int start, int len) { pVGH)6P>|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tam\,j
} `Qg#`
} `Qrrnq
} </%n:<z4
} `H7V['
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堆排序： [|NgrU_.
"\:ZH[j
package org.rut.util.algorithm.support; YdT-E
*a2y
import org.rut.util.algorithm.SortUtil; 5V($|3PI
DKzP)!B "
/** :q+D`s
* @author treeroot ?d? cD
* @since 2006-2-2 'h:[[D%H`
* @version 1.0 sXmZ0Dv
*/ j$f`:A
public class HeapSort implements SortUtil.Sort{ 'B$bGQ
ti)4J2c,8
/* (non-Javadoc) ;?A?1q8*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q.dHg7+D
*/ 6kc/
public void sort(int[] data) { z3lMD'uU3
MaxHeap h=new MaxHeap(); CLU[')H0
h.init(data); 1 ^k#g,
for(int i=0;i h.remove(); -XSu;'4q
System.arraycopy(h.queue,1,data,0,data.length); `T;M=S^y*E
} 'aWzam>
lk5}bnd5
private static class MaxHeap{ 4/rdr80
zg3q\~
void init(int[] data){ kp+\3z_
this.queue=new int[data.length+1]; bN#)F
for(int i=0;i queue[++size]=data; (:p&[HNuN
fixUp(size); m;v/(d>
} pFu3FUO*;
} $g|/.XH%
U =()T}b>
private int size=0; D/jS4'$vA
e:BKdZGW
private int[] queue; TV>UD q
;tR,w
public int get() { }v[$uT-q
return queue[1]; Tv;|K's'
} O?ZCX_R:L
=9oN#4mWK
public void remove() { ~D4%7U"dv
SortUtil.swap(queue,1,size--); >^@/Ba$h
fixDown(1); 07T"alXf:A
} &&}'
file://fixdown nKFua l3
private void fixDown(int k) { cD6$C31Y]
int j; W@^O'&3d
while ((j = k << 1) <= size) { (~r"N?`
if (j < size %26amp;%26amp; queue[j] j++; o0>z6Ya<
if (queue[k]>queue[j]) file://不用交换 5]WpH0kzO
break; _RFTm.9&
SortUtil.swap(queue,j,k); io]e]m%
k = j; :bLLN
} zY<=r.m4
} uvK1gJrA)
private void fixUp(int k) { )g9&fGYf
while (k > 1) { F6gboo)SD
int j = k >> 1; Ly?gpOqu5
if (queue[j]>queue[k]) hsVf/%
break; @)>9l&
SortUtil.swap(queue,j,k); /q4<ZS#
k = j; Y~T;{&wi
} slV+2b
} ^D(N_va<
-{i;!XE$SR
} ?Sj3-*/?
QvK-3w;=
} vdloh ,
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SortUtil： W'2|hP
W8Z&J18AU
package org.rut.util.algorithm; [kx_Izi/T
vu[+UF\G
import org.rut.util.algorithm.support.BubbleSort; +A 6xY
import org.rut.util.algorithm.support.HeapSort; `MAluu+b
import org.rut.util.algorithm.support.ImprovedMergeSort; TY[1jW~{r
import org.rut.util.algorithm.support.ImprovedQuickSort; d/G`w{H}y
import org.rut.util.algorithm.support.InsertSort; I"4j152P|
import org.rut.util.algorithm.support.MergeSort; 0FfBD[E:
import org.rut.util.algorithm.support.QuickSort; ID"'`DKxe
import org.rut.util.algorithm.support.SelectionSort; @.f@N;z
import org.rut.util.algorithm.support.ShellSort; UXVjRY`M.\
HDUtLUd
/** h_ef@ZwSw
* @author treeroot *R.Q!Lv+
* @since 2006-2-2 77- Jx`C
* @version 1.0 t>QAM6[
*/ +2!J3{[J
public class SortUtil { rr fL[
public final static int INSERT = 1; YB/A0J
public final static int BUBBLE = 2; TQDb\d8,f
public final static int SELECTION = 3; JX,&im*BG
public final static int SHELL = 4; @e#eAJhU
public final static int QUICK = 5; i|PQNhUe
public final static int IMPROVED_QUICK = 6; d:C-
public final static int MERGE = 7; Qhb].V{utV
public final static int IMPROVED_MERGE = 8; )=TD}Xb
public final static int HEAP = 9; R4G$!6Ld
K2,oP )0.Y
public static void sort(int[] data) { Xxcv5.ug
sort(data, IMPROVED_QUICK); `f`\j -Lu
} %;kr%%t%
private static String[] name={ 2bBTd@m4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :IDD(<^9
}; rD)yEuYX
~TCz1UWV
private static Sort[] impl=new Sort[]{ aObWd5~
new InsertSort(), PLR[nB7K
new BubbleSort(), !_rAAY
new SelectionSort(), WUx}+3eWv
new ShellSort(), 'L)@tkklp
new QuickSort(), preKg$U
new ImprovedQuickSort(), @O9.~6
new MergeSort(), Cw]&B
new ImprovedMergeSort(), hXdc5 ?i?
new HeapSort() 'F3Xb
}; S'qEBz
z><=F,W
public static String toString(int algorithm){ T8E=}!68w}
return name[algorithm-1]; }I<r=?
} BYt#aqf
VE5w!of
public static void sort(int[] data, int algorithm) { 3a #2 }
impl[algorithm-1].sort(data); nsFOtOdd
} |f1 S&b.
Gqq%q!k&1
public static interface Sort { braHWC'VYg
public void sort(int[] data); ~*RG|4#
} B}_*0D
xayo{l=uGv
public static void swap(int[] data, int i, int j) { <EFA^,3t%
int temp = data; x? 3U3\W
data = data[j]; U 2am1}
data[j] = temp; xo2PxUO
} 4b]/2H
} -(9>{!",J