[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; 5kLz8n^z@@
} JXQh$hs
int i1=l; HlOn=>)<
int i2=mid+1; +!cibTQTT
for(int cur=l;cur<=r;cur++){ 1b,MJ~g$
if(i1==mid+1) w&x$RP
data[cur]=temp[i2++]; NCivh&HR
else if(i2>r) dZ|x `bIgs
data[cur]=temp[i1++]; V.}3d,Em%]
else if(temp[i1] data[cur]=temp[i1++]; YB]{gm2
else S+bpWA
data[cur]=temp[i2++]; c&'5r OY~
} [w{x+6uX'
} |ngv{g
{F ',e~}s
} !g4u<7
ymb{rKkN3
改进后的归并排序: m[qW)N:w
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package org.rut.util.algorithm.support; ;T :]?5W!
VQ8Q=!]
import org.rut.util.algorithm.SortUtil; 4u=v
Kh7C7[&
/** R1~wzy
* @author treeroot \p#_D|s/Ep
* @since 2006-2-2 )x3p7t)#
* @version 1.0 3c+ps;nh
*/ Ya;y@44
public class ImprovedMergeSort implements SortUtil.Sort { IG90mpLX
oVQbc\P3
private static final int THRESHOLD = 10; R!rj:f!>
9`tSg!YOh
/* |#ZMZmo{
* (non-Javadoc) W H%EC$
* >e!Y63`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e=`=7H4P
*/ IL{tm0$r
public void sort(int[] data) { !3)WW)"!r
int[] temp=new int[data.length]; 6h7TM?lt
mergeSort(data,temp,0,data.length-1); &3 *#h
} r"!xI
<72q^w
private void mergeSort(int[] data, int[] temp, int l, int r) { (,D:6(R7t
int i, j, k; Xi0fX$-,
int mid = (l + r) / 2; g(dReC
if (l == r) ej,R:}C%`
return; ;)q"X>FMZe
if ((mid - l) >= THRESHOLD) -8yN6 0|
mergeSort(data, temp, l, mid); hv*XuT/
else r7FpR!
insertSort(data, l, mid - l + 1); "R]wPF5u
if ((r - mid) > THRESHOLD) nh+Hwj#(x
mergeSort(data, temp, mid + 1, r); *p0Kw>
else $"ACg!=M
insertSort(data, mid + 1, r - mid); ;tC$O~X
JHa\"h
for (i = l; i <= mid; i++) { :,V&P_
temp = data; Jwpc8MQ
} %+oqAYm+s
for (j = 1; j <= r - mid; j++) { Hu+GN3`sx^
temp[r - j + 1] = data[j + mid]; O9rA3qv B
} sGx3O i
int a = temp[l]; 5zz">-Q !
int b = temp[r]; >qZl s'
for (i = l, j = r, k = l; k <= r; k++) { 3)y=}jw
if (a < b) { 06z+xxCo
data[k] = temp[i++]; aSMoee@!
a = temp; hQeG#KQ
} else { Ax*xa6_2
data[k] = temp[j--]; mrBK{@n
b = temp[j]; <R?S
} u.Tknw-X
} s8dP=_ `
} Z1_F)5pn
:eIQF7-
/** beB3*o
* @param data [\rzXE
* @param l ]3~u @6
* @param i Y h53Z"a
*/ C;~LY&=
private void insertSort(int[] data, int start, int len) { tIS.,CEQF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [I}z\3Z %
} ueEf>0
} DFvGc`O4
} e*Y<m\*
} ^!z(IE'
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堆排序： -Jt36|O
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package org.rut.util.algorithm.support; gwr?(:?
<[K3Prf C
import org.rut.util.algorithm.SortUtil; @`ii3&W4
2R W~jn"
/** ^SK!?M
* @author treeroot *c 9S.
* @since 2006-2-2 /vC!__K9:
* @version 1.0 N`~f77G
*/ F\^\,hy
public class HeapSort implements SortUtil.Sort{ +ViL"
Eu<f
/* (non-Javadoc) X#HH7V>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nuVux5:
*/ %y7ZcH'
public void sort(int[] data) { K0D|p$v
MaxHeap h=new MaxHeap(); qWf[X'
h.init(data); (\o4 c0UzK
for(int i=0;i h.remove(); =R"LB}>h}
System.arraycopy(h.queue,1,data,0,data.length); P@D\5}*6
} a_-@rceU
w|Ry)[
private static class MaxHeap{ f8ZuG !U
#lc6-K#
void init(int[] data){ d2TIG<6/
this.queue=new int[data.length+1]; w@Asz9Lq%
for(int i=0;i queue[++size]=data; Z}{]/=h
fixUp(size); Xppv
} Uf MQ?(,
} CM%;/[WBxy
?J-\}X
private int size=0; yL),G*[p\}
>TiEYMW
private int[] queue; /8!n7a7
/;{L~f=et)
public int get() { ([^#.x)hz
return queue[1]; I@\D tQZ
} w=3 j'y{f
y0-UO+;
public void remove() { \&~YFjB
SortUtil.swap(queue,1,size--); RAnF=1[v
fixDown(1); 1;'-$K`}
} }h1eB~6M
file://fixdown R.DUfU"gp
private void fixDown(int k) { \98N8p;,I
int j; ><S(n#EB
while ((j = k << 1) <= size) { o 0T1pGs'
if (j < size %26amp;%26amp; queue[j] j++; gf?N(,
if (queue[k]>queue[j]) file://不用交换 i=1crJ:
break; EJRkFn8XG'
SortUtil.swap(queue,j,k); Ke=+D'=
k = j; oz]&=>$1I
} \ \Tz'>[\
} D[}^G5
private void fixUp(int k) { t&NpC;>v
while (k > 1) { RWX!d54&
int j = k >> 1; hg#O_4D
if (queue[j]>queue[k]) pw5{=bD
break; qj `C6_?
SortUtil.swap(queue,j,k); |)C*i
k = j; Dv L8}dz
} 8Lgm50bs
} S4?WR+:h
OZd (~E
} yimK"4!j5A
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} =FI[/"476
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SortUtil： 5pC}ZgEa<
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package org.rut.util.algorithm; 1e7I2g
ekU%^R<
import org.rut.util.algorithm.support.BubbleSort; (9kR'kr
import org.rut.util.algorithm.support.HeapSort; WUo\jm[yr
import org.rut.util.algorithm.support.ImprovedMergeSort; m(d|TwG{
import org.rut.util.algorithm.support.ImprovedQuickSort; tK/.9qP
import org.rut.util.algorithm.support.InsertSort; L &hw-.Q
import org.rut.util.algorithm.support.MergeSort; >fth iA
import org.rut.util.algorithm.support.QuickSort; s$?LMfT
import org.rut.util.algorithm.support.SelectionSort; &CSy>7&q
import org.rut.util.algorithm.support.ShellSort; 3"< 0_3?W
"^!y>]j#A
/** {qbe ye!
* @author treeroot :>r W`= e'
* @since 2006-2-2 uv<_.Jq]
* @version 1.0 zx,9x*g
*/ So8 Dwz?
public class SortUtil { psc Fb$b
public final static int INSERT = 1; i;s;:{cn
public final static int BUBBLE = 2; Pr(@&:v:
public final static int SELECTION = 3; { PJ>gX$
public final static int SHELL = 4; Gk/cP`
public final static int QUICK = 5; HZ2W`wo
public final static int IMPROVED_QUICK = 6; {:#nrD"
public final static int MERGE = 7; UV0[S8A
public final static int IMPROVED_MERGE = 8; ,|}mo+rb-
public final static int HEAP = 9; V=% ;5/
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public static void sort(int[] data) { YYPJ(o\
sort(data, IMPROVED_QUICK); GN9kCyPK
} a@<-L
private static String[] name={ %+Y wzL{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z<^!N)
}; ,W|-?b?
K1BBCe
private static Sort[] impl=new Sort[]{ QIlZZ
new InsertSort(), %>_6&A{K,d
new BubbleSort(), %=Z/Frd
new SelectionSort(), j*Pq<[~
new ShellSort(), MpGG}J[y
new QuickSort(), j7Ts&;`[*
new ImprovedQuickSort(), rUmP_
new MergeSort(), FMI1[|:;
new ImprovedMergeSort(), \!BVf@>p%
new HeapSort() 1^E5VG1[
}; {jmy:e2
3l41"5Fy&
public static String toString(int algorithm){ GGr82)E
return name[algorithm-1]; Qubu;[0+a
} 6]d]0TW_
qP<D9k>
public static void sort(int[] data, int algorithm) { 4oueLT(zc
impl[algorithm-1].sort(data); O!{YwE8x9
} V+y"L>K
Up'#OkTx
public static interface Sort { {7@*cBqN
public void sort(int[] data); uC#@qpzy
} /]5*;kO`
M<n'ZDK`W
public static void swap(int[] data, int i, int j) { {srxc4R`
int temp = data; `&7tADFB
data = data[j]; -fmJkI
data[j] = temp; 7>BfHb
} w4Df?)Z
} DyiJ4m}kh