[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; B6XO&I1c
} tMr7d
int i1=l; &|SWy 2N
int i2=mid+1; xh6(~'$
for(int cur=l;cur<=r;cur++){ =;Id["+
if(i1==mid+1) K2m>D=w
data[cur]=temp[i2++]; AZ:7_4jz
else if(i2>r) n `j._G
data[cur]=temp[i1++]; ~{x1/eH
else if(temp[i1] data[cur]=temp[i1++]; ~%hdy@
else *miG<
data[cur]=temp[i2++]; #ydold{F
} #J5BHY~
} 9O[IR)O~
[X(m[u'%
} jzvK;*N
{sTf4S\S
改进后的归并排序: BU nujC
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package org.rut.util.algorithm.support; <,.$U\W
9t! d.}
import org.rut.util.algorithm.SortUtil; ?y>N&\pt2
g/?Vl2W
/** j*=!M# D
* @author treeroot #h!+b
* @since 2006-2-2 c '|*{%<e2
* @version 1.0 |jsI-?%8J
*/ ktu?-?#0,
public class ImprovedMergeSort implements SortUtil.Sort { RK# 6JfC3X
YMGy-]!o
private static final int THRESHOLD = 10; X<ex >sM
;W|kc</R*
/* UhB+c
* (non-Javadoc) ?7\V)$00(&
* 1=VyD<dNG6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xBHf~:!
*/ PZ[-a-p40
public void sort(int[] data) { xL* psj
int[] temp=new int[data.length]; Khq\@`RaT
mergeSort(data,temp,0,data.length-1); ci,(]T+!
} $`pf!b2Z
1N5 E
private void mergeSort(int[] data, int[] temp, int l, int r) { wl=tN{R
int i, j, k; NP>v@jO
int mid = (l + r) / 2; SH*'<
if (l == r) ^Z (cVg
return; /E>;O47a
if ((mid - l) >= THRESHOLD) f5}afPk
mergeSort(data, temp, l, mid); J%bNt)K}
else \%-<O
insertSort(data, l, mid - l + 1); BRFsw`c
if ((r - mid) > THRESHOLD) I=`?4%
mergeSort(data, temp, mid + 1, r); &9jJ\+:7
else -:}vf?
insertSort(data, mid + 1, r - mid); pj'gTQ),0
|N,^*xP(6
for (i = l; i <= mid; i++) { UrniJB]
temp = data; Z;+,hR((
} 'r'=%u$1C
for (j = 1; j <= r - mid; j++) { ]dycesc'
temp[r - j + 1] = data[j + mid]; \Y#
} 0%xktf
int a = temp[l]; >=k7#av
int b = temp[r]; 92-Xz6Bo9
for (i = l, j = r, k = l; k <= r; k++) { e\)%<G5
if (a < b) { &{)<Q(g
data[k] = temp[i++]; F6{g{ B
a = temp; '!>9j,BJ
} else { TtJX(N~
data[k] = temp[j--]; nC:T0OJv
b = temp[j]; "jZZ>\
} 4vg,g(qi<
} 8~y!X0Ov!
} cMK|t;" 3
oKGH|iVEe
/** l@Lk+-[D
* @param data wXNng(M7
* @param l 'O%*:'5k
* @param i t/i*.>7
*/ RXRbW%b
private void insertSort(int[] data, int start, int len) { +;,{`*W+N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GzEw~JAs
} '{`KYKLP+
} ?MDo. z3
} n'rq
} u7!gF&tA
-O})Y>=}
堆排序： ,|f=2t+5X
hl]d99Lc
package org.rut.util.algorithm.support; ]W3u~T*
~#gc{C@
import org.rut.util.algorithm.SortUtil; DzC`yWstP
g.\b@0Uy'
/** fwppqIM
* @author treeroot hn.(pI1
* @since 2006-2-2 d 6Y9D=O
* @version 1.0 \]Y<d
*/ H_g]q
public class HeapSort implements SortUtil.Sort{ ErN[maix#
[KUkv
/* (non-Javadoc) h5{//0 y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b$w66q8
*/ 7L+Wj }m
public void sort(int[] data) { Tw\@]fw
MaxHeap h=new MaxHeap(); 2k!uk6
h.init(data); /{({f?k<\/
for(int i=0;i h.remove(); xK8m\=#
System.arraycopy(h.queue,1,data,0,data.length); ~N/%R>(v
} ^uX"04>;
l[ko)%7V
private static class MaxHeap{ M5[#YG'FlQ
/XG7M=A$o
void init(int[] data){ yI=nu53BV
this.queue=new int[data.length+1]; lC*xyOK
for(int i=0;i queue[++size]=data; 5I*1CIO
fixUp(size); pg!mOyn
} W)`>'X`
} 2w8YtM3+"z
kFJ]F |^7
private int size=0; Z=hn}QY.(
x~l"'qsK
private int[] queue; \>T1&JT
SFzoRI=qG
public int get() { zt((TD2
return queue[1]; 'bv(T2d~~
} *{JD=ua
:wzbD,/M
public void remove() { ^`-Hg=d
SortUtil.swap(queue,1,size--); 7ey|~u2
fixDown(1); Gj#BG49g2
} <)cmI .J3
file://fixdown :&_@U$
private void fixDown(int k) { w'L;`k;Q
int j; u;=("S{"0
while ((j = k << 1) <= size) { <~: g
if (j < size %26amp;%26amp; queue[j] j++; nH[@EL
if (queue[k]>queue[j]) file://不用交换 u=ENf1{ $>
break; T( ;BEyc?
SortUtil.swap(queue,j,k); ]&}?J:+?0E
k = j; Ui?t@.
} {?5EOp~
} iT.hXzPzr*
private void fixUp(int k) { ](T*f'LN
while (k > 1) { yP-.8[;
int j = k >> 1; jriliEz;f
if (queue[j]>queue[k]) `^_.E:f
break; F}sfk}rp
SortUtil.swap(queue,j,k); Cs*u{O
k = j; VK$+Nm)
} *d,SI[c%e
} s\kkD*
,Zs-<e"
} 0eUsvzz15
T_B$
} 8c~b7F \
>L=l{F6 p
SortUtil： #]:nQ(
M+nz~,![
package org.rut.util.algorithm; F!SmCE(0x
ii~~xt1
import org.rut.util.algorithm.support.BubbleSort; wcV~z:&^5
import org.rut.util.algorithm.support.HeapSort; 'f5,%e2#
import org.rut.util.algorithm.support.ImprovedMergeSort; Kb4u)~S:
import org.rut.util.algorithm.support.ImprovedQuickSort; fv`%w
import org.rut.util.algorithm.support.InsertSort; vH7"tz&RIp
import org.rut.util.algorithm.support.MergeSort; \mv7"TM
import org.rut.util.algorithm.support.QuickSort; NFc<%#H
import org.rut.util.algorithm.support.SelectionSort; Vl'|l)b4W
import org.rut.util.algorithm.support.ShellSort; bh_i*DJ]
w"A'uFXLc
/** "3}Bv X
* @author treeroot xJZbax[
* @since 2006-2-2 YFsEuaV
* @version 1.0 t;E-9`N
*/ ]M= 3Sn8}
public class SortUtil { Yo:>m*31
public final static int INSERT = 1; [h,T.zpa
public final static int BUBBLE = 2; \!s0VEE
public final static int SELECTION = 3; =;c? 6{<1
public final static int SHELL = 4; +h[$\_y
public final static int QUICK = 5; @\[&_DZ
public final static int IMPROVED_QUICK = 6; &.Yh_
public final static int MERGE = 7; Ks!.$y:x
public final static int IMPROVED_MERGE = 8; ggX'`bK
public final static int HEAP = 9; "K~+T\^|k
.qF@ }dO
public static void sort(int[] data) { U2+CL)al^
sort(data, IMPROVED_QUICK); ,/JrQWgD
} ^9"|tWf6O
private static String[] name={ N6yqA)z?;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \+S~N:@><k
}; R-hqaEB
nQg6 j Zf
private static Sort[] impl=new Sort[]{ RQ9T<t42
new InsertSort(), I)DLnnQQ
new BubbleSort(), 4$ejJaE
new SelectionSort(), _Z5l Nu
new ShellSort(), j}S
new QuickSort(), v@"xEf1n[
new ImprovedQuickSort(), h^34{pKDn
new MergeSort(), \asF~P
new ImprovedMergeSort(), r~TiJ?8I
new HeapSort() bIe>j*VPh@
}; $7M64K{
-twIF49
public static String toString(int algorithm){ g:e|
return name[algorithm-1]; op&,&
} 6$@Pk<w
<k/'mBDk
public static void sort(int[] data, int algorithm) { uZ%b6+(
impl[algorithm-1].sort(data); E{Y0TZ+
} 6+m)
x\;`x$3t
public static interface Sort { tkV:kh< L~
public void sort(int[] data); EmG`ga)s
} 8r)eiERv
J)6RXt*!
public static void swap(int[] data, int i, int j) { |O%`-2p]p
int temp = data; .8<bz4
data = data[j]; 63#Sf$p{v
data[j] = temp; ;_@u@$=~
} ^cz#PNB
} I:P/ ?-