[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; 5c6?$v/
} dW"=/UW
int i1=l; kPFqsq
int i2=mid+1; *ta?7uSiT
for(int cur=l;cur<=r;cur++){ {Nny.@P)H
if(i1==mid+1) c>yqq'
data[cur]=temp[i2++]; qBcwM=R3P
else if(i2>r) OVU+V 0w1a
data[cur]=temp[i1++]; |eFce/
else if(temp[i1] data[cur]=temp[i1++]; C?7I(b:
else 6%fF6
data[cur]=temp[i2++]; NekPl/4
} nY50dFA,
} VgcLG ]tE[
Eh|v>Yew
} 6@geakq
&bT \4
改进后的归并排序: ]Qh0+!SdG
<~-cp61z;
package org.rut.util.algorithm.support; @1O.;
geSH3I
import org.rut.util.algorithm.SortUtil; -DE?L,9X9
RP~ hi%A
/** o@A|Lm.
* @author treeroot ~)IiF.I b
* @since 2006-2-2 #Bi8>S
* @version 1.0 PNhxF C.
*/ xjg(}w
public class ImprovedMergeSort implements SortUtil.Sort { 5BB:.
b[`fQv$G
private static final int THRESHOLD = 10; /m(v5v7(
y8CH=U[
/* $ {5|{`
* (non-Javadoc) hYEUiQ
* M5T4{^i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zsx\GeE%:
*/ ])H[>.?K
public void sort(int[] data) { a?ux
int[] temp=new int[data.length]; VVDd39q
mergeSort(data,temp,0,data.length-1); Y>Tok|PV
} kNrN72qg
ud:5_*
private void mergeSort(int[] data, int[] temp, int l, int r) { 6z ,nt
int i, j, k; ;FO( mL(
int mid = (l + r) / 2; |++\"g
if (l == r) *^Xtorqo
return; k{-#2Qz
if ((mid - l) >= THRESHOLD) PQA}_o
mergeSort(data, temp, l, mid); _0EKE
else ?5jq)xd2
insertSort(data, l, mid - l + 1); :~%{
if ((r - mid) > THRESHOLD) 0mi$_Ld+
mergeSort(data, temp, mid + 1, r); {bD:OF
else `T(T]^C98
insertSort(data, mid + 1, r - mid); r`5svY
5tQZf'pHfd
for (i = l; i <= mid; i++) { SVJt= M
temp = data; c%vtg.A
} /7jb&f
for (j = 1; j <= r - mid; j++) { n>\2_$uDI
temp[r - j + 1] = data[j + mid]; t?;\'
} kYnp$8
int a = temp[l]; Dwuao`~Xm
int b = temp[r]; caXSt2|'
for (i = l, j = r, k = l; k <= r; k++) { =@y ?Np^A
if (a < b) { uwo\FI
data[k] = temp[i++]; y';"tDFb
a = temp; ~1.B fOR8
} else { cPbAR'
data[k] = temp[j--]; ((cRe6
b = temp[j]; 5}NTqN0@
} K0C3s
} -0f,qNF
} 1yV+~)by3
]@A}v\wa
/** (,OF<<OH
* @param data 3+oGR5gIN
* @param l 35/K9l5
* @param i .-4]FGg3
*/ W|4h;[w
private void insertSort(int[] data, int start, int len) { +\)a p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g`r4f%O
} ne9- c>>
} /wT<p
} 8Ai\T_l
} Nn='9s9F?}
W@FSQ8b>$m
堆排序： pX?/=T@ Bw
8KMo!p\i
package org.rut.util.algorithm.support; lFZl}x
o9]i {e>L
import org.rut.util.algorithm.SortUtil; 2wwJ>iR`
><i: P*ht
/** H7dT6`<~Y
* @author treeroot W*r1Sy
* @since 2006-2-2 V[2}
* @version 1.0 Z~1uyr(
*/ ?4cj"i
public class HeapSort implements SortUtil.Sort{ j06qr\Es
w9TE E,t;5
/* (non-Javadoc) TX).*%f[r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yan}H}Oq
*/ ;LqpX!Pi f
public void sort(int[] data) { 3*=_vl3
MaxHeap h=new MaxHeap(); l!mx,O`
h.init(data); zEk/15
for(int i=0;i h.remove(); 6KDm#7J
System.arraycopy(h.queue,1,data,0,data.length); SZ1yy["
} ],s{%a5wC
#7['M;_
private static class MaxHeap{ }inV)QQ
<S3s==Cg
void init(int[] data){ aUk]wiwIR9
this.queue=new int[data.length+1]; M@+Pq/f:
for(int i=0;i queue[++size]=data; Zygu/M6
fixUp(size); DR7JEE
} se=;vp]3a
} qPBOt;N
0Ua&_D"
private int size=0; -G(#,rXk
eY[kUMo
private int[] queue; xauMF~*
==AmL]*
public int get() { Jq?Fi'2F%
return queue[1]; ksf6O$
} !<>*|a
Cy dV$!&mP
public void remove() { 72ZoN<c
SortUtil.swap(queue,1,size--); 3~1Gts
fixDown(1); "!ks7:}v
} P^AI*tH"m
file://fixdown SHT`
private void fixDown(int k) { {krBAz&
int j; ?Wc+ J4
while ((j = k << 1) <= size) { n8tw8o%&[
if (j < size %26amp;%26amp; queue[j] j++; c9x&:U
if (queue[k]>queue[j]) file://不用交换 =Cd{bj.8
break; 8([ MR
SortUtil.swap(queue,j,k); 25 cJA4
k = j; ?|~KF:,#}
} lffw "
} /cT6X]o8
private void fixUp(int k) { +)LCYDRV7
while (k > 1) { .N7<bt@~)
int j = k >> 1; Y"L|D,ex
if (queue[j]>queue[k]) N\|BaZ%>|
break; #\ uB!;Q
SortUtil.swap(queue,j,k); %JgdLnQE
k = j; O?ODfO+>
} 7>=
} 8@Bm2?$}g
udXzsY9Ng
} />N#PF
W-*HAS
} cyo[HI?WM
D|*yeS4>
SortUtil： e_"m\e#N
IXG@$O?y/
package org.rut.util.algorithm; -y>~ :.
S+"Bq:u"
import org.rut.util.algorithm.support.BubbleSort; CF 3V)3}
import org.rut.util.algorithm.support.HeapSort; mx#%oJnsi
import org.rut.util.algorithm.support.ImprovedMergeSort; #m17cDL
import org.rut.util.algorithm.support.ImprovedQuickSort; iL2__TO
import org.rut.util.algorithm.support.InsertSort; TB-dV'w
import org.rut.util.algorithm.support.MergeSort; !C h1q
import org.rut.util.algorithm.support.QuickSort; r@/@b{=
import org.rut.util.algorithm.support.SelectionSort; M4D @G
import org.rut.util.algorithm.support.ShellSort; bYoBJ #UX
>bd@2au9!
/** g)R2V
* @author treeroot wqi0%Cu*
* @since 2006-2-2 vZW[y5
* @version 1.0 BeN]D
*/ @meT8S9t
public class SortUtil { ,`02fMOLc
public final static int INSERT = 1; I&m' a
public final static int BUBBLE = 2; G$2@N6
public final static int SELECTION = 3; ^`B;SSV
public final static int SHELL = 4; bLSc=f&
public final static int QUICK = 5; ,@/O\fit)
public final static int IMPROVED_QUICK = 6; YWs?2I
public final static int MERGE = 7; P@f#DX )
public final static int IMPROVED_MERGE = 8; hNhEA $X5
public final static int HEAP = 9; .rITzwgB
\7%#4@;?
public static void sort(int[] data) { ;b:'i&r
sort(data, IMPROVED_QUICK); .xuzu#-
} +*Z'oCBJ,
private static String[] name={ {z\K!=X/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (^(l=EN-<
}; TQmrL
SZyORN
private static Sort[] impl=new Sort[]{ JXMH7
new InsertSort(), gb|;]mk*"
new BubbleSort(), #]6{>n1*+w
new SelectionSort(), H%XF~tF:
new ShellSort(), \=7jp|{Yl
new QuickSort(), ca,W:9#.xn
new ImprovedQuickSort(), d#]hqy
new MergeSort(), BjagG/sX
new ImprovedMergeSort(), !><asaB]1
new HeapSort() s5rD+g]E`
}; &^#u=w?^x
]ly" K!1,
public static String toString(int algorithm){ 8#VD u(
return name[algorithm-1]; NPS*0y/
} k=[s%O6H
w]yVNB
public static void sort(int[] data, int algorithm) { !yxqOT-
impl[algorithm-1].sort(data); 0#Lmajs
} %T\hL\L?
'5 ~cd
public static interface Sort { =#,`k<v%I
public void sort(int[] data); M:{Aq&.
} o.Rv<a5.L
YcX\t6VK
public static void swap(int[] data, int i, int j) { 9$Z0mzk
int temp = data; Qj;{Z*l%+
data = data[j]; mHHlm<?]
data[j] = temp; )0iN2L]U;
} pm,xGo2
} ON){d!]uJ