[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; a;; Es
} 9\Ff z&
int i1=l; V73/q
int i2=mid+1; PeiRe
for(int cur=l;cur<=r;cur++){ *mj=kJ7(
if(i1==mid+1) 5-fASN.Lx
data[cur]=temp[i2++]; |dHtv6I
else if(i2>r) 9wf"5c
data[cur]=temp[i1++]; Zi]E!Tgn
else if(temp[i1] data[cur]=temp[i1++]; Tzjv-9^V
else +Z_VF30pa
data[cur]=temp[i2++]; alzdYiGf
} tXrKC
} 58HAl_8W
=IX-n$d`>
} J{a9pr6
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改进后的归并排序: JBc*m
*wJz0ex7R/
package org.rut.util.algorithm.support; _(:$ :*@
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import org.rut.util.algorithm.SortUtil; U&*%KPy`
9L-jlAo<
/** VR"le&'z"
* @author treeroot \X(*JNQ
* @since 2006-2-2 SzeY?04zj:
* @version 1.0 T?A3f]U
*/ aYk: CYQ
public class ImprovedMergeSort implements SortUtil.Sort { A+H8\ew2,
l\N2C4NG
private static final int THRESHOLD = 10; E%8uQ2p(
JURu>-i
/* l9j=;h
* (non-Javadoc) s 8K.A~5 w
* *(vh|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [h B$%i]\<
*/ 862rol
public void sort(int[] data) { ]i,o+xBKH
int[] temp=new int[data.length]; @C=gMn.E
mergeSort(data,temp,0,data.length-1); vAop#V
} AH'3 5Kf)
byt$Wqdl
private void mergeSort(int[] data, int[] temp, int l, int r) { 3 .j/D^
int i, j, k; RRQv<x
int mid = (l + r) / 2; Bnwq!i!M
if (l == r) JP( tf+
return; ;C1#[U1Uy
if ((mid - l) >= THRESHOLD) *m>[\)
mergeSort(data, temp, l, mid); ^gyI-S(;
else BaP'y8dVN
insertSort(data, l, mid - l + 1); tG9C(D`G
if ((r - mid) > THRESHOLD) K3=0D!Dq
mergeSort(data, temp, mid + 1, r); BL>~~
else d+]=l+&
insertSort(data, mid + 1, r - mid); QH7 GEj]
I} Q+{/?/
for (i = l; i <= mid; i++) { \AoqOC2u
temp = data; Cq<Lj
} ra^%__N}
for (j = 1; j <= r - mid; j++) { Ax=)J{4v
temp[r - j + 1] = data[j + mid]; }z9v*C
} @}PX:*c
int a = temp[l]; eAP 8!
int b = temp[r]; {=&({ cS
for (i = l, j = r, k = l; k <= r; k++) { uxKO"
if (a < b) { Z'5&N5hx
data[k] = temp[i++]; s7:_!Nd@8
a = temp; y>h9:q|
} else { pNQ7uy
data[k] = temp[j--]; /D|q-`*K
b = temp[j]; s]A8C^;c
} [%6)
} pH3\X cn
} #M#$2Vt
x)$0Nr62D
/** t3^`:T\
* @param data M5:*aCN6P
* @param l jVoD9H F/
* @param i iY,oaC~?"N
*/ qZV|}M>P)
private void insertSort(int[] data, int start, int len) { j}tGcFwvSN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^ )!eiM
} '+iLW~
} (IjM
} _p9"MU&}
} b9T6JS j
)~"0d;6_
堆排序： :#n>Q1}x
Tw*p^rU
package org.rut.util.algorithm.support; *$;Zk!sEF
%2\Pe 2Z
import org.rut.util.algorithm.SortUtil; {(Mmv[y
`Z{s,!z
/** z_KCG2=5
* @author treeroot DMp@B]>
* @since 2006-2-2 \4<|QE
* @version 1.0 rp1+K4]P
*/ >XiT[Ru
public class HeapSort implements SortUtil.Sort{ 2w+4B4
s?9Y3]&+&M
/* (non-Javadoc) #k>A,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L>7@!/9L
*/ }1Mf0S
public void sort(int[] data) { \x4:i\Fx@
MaxHeap h=new MaxHeap(); DVg$rm`
h.init(data); ?Oy0p8
for(int i=0;i h.remove(); cCx{ ")
System.arraycopy(h.queue,1,data,0,data.length); ,-(D(J;}1
} 7D 3-/_v
TOa6sB!H
private static class MaxHeap{ {=gJGP/}_
./'d^9{
void init(int[] data){ 5X5UUdTM
this.queue=new int[data.length+1]; @y * TVy
for(int i=0;i queue[++size]=data; rHOhi|+
fixUp(size); `e3$jy@
} JwWxM3(%t
} Y8lZ]IB
SH8zkAA7u}
private int size=0; B#5[PX
FK-q-PKO#.
private int[] queue; $XkO\6kh
gyh8
public int get() { V=1zk-XC
return queue[1]; |:2B)X
} fWri7|"0h
<_=O0 t|6
public void remove() { c1y+kvv
SortUtil.swap(queue,1,size--); x7i<dg&
fixDown(1); BE~-0g$W
} _]D 6m2R
file://fixdown ! jDopE0L
private void fixDown(int k) { D8Mq '$-
int j; 9pS:#hg
while ((j = k << 1) <= size) { i-@V
if (j < size %26amp;%26amp; queue[j] j++; R@_3?Z!W=
if (queue[k]>queue[j]) file://不用交换 sD{Wc%5
break; kw2d<I$]
SortUtil.swap(queue,j,k); `2x.-
k = j; k:@N6K/$P^
} r[GH#vF;7
} :kwDa a
private void fixUp(int k) { .J+F HG'
while (k > 1) { kFyp;=d:K
int j = k >> 1; Lg#(?tMp,'
if (queue[j]>queue[k]) {7%HK2='
break; >@4AxV\
SortUtil.swap(queue,j,k); 3kF+wifsz
k = j; R1%J6wZq
} Q%J,:J
} A9"!=/~
^\J-LU|"B
} GY0OVAW6'c
9zCuVUcd$.
} 1Qz@
G^dzE/:
SortUtil： P7/Xh3
E?BF8t_fTE
package org.rut.util.algorithm; hy$VG%b;#
f4+wP/n&
import org.rut.util.algorithm.support.BubbleSort; m^TN6/])
import org.rut.util.algorithm.support.HeapSort; eT(X Ri0
import org.rut.util.algorithm.support.ImprovedMergeSort; Odhr=Hs
import org.rut.util.algorithm.support.ImprovedQuickSort; _RZ"WA^[
import org.rut.util.algorithm.support.InsertSort; Iu >4+6
import org.rut.util.algorithm.support.MergeSort; W5:fY>7
import org.rut.util.algorithm.support.QuickSort; ,7k1n{C)
import org.rut.util.algorithm.support.SelectionSort; aU[!*n 4Ux
import org.rut.util.algorithm.support.ShellSort; rwgj]
ZZCm438
/** R1<$VR
* @author treeroot ^~@3X[No
* @since 2006-2-2 ;<GxonIV
* @version 1.0 p1HbD`ST
*/ F8Mf,jnPs
public class SortUtil { FS!)KxC/-
public final static int INSERT = 1; gm!sLZ!X
public final static int BUBBLE = 2; 8.I3%u
public final static int SELECTION = 3; 3=} P l,
public final static int SHELL = 4; }Ujgd2(U
public final static int QUICK = 5; ('\sUZ+5
public final static int IMPROVED_QUICK = 6; |R!ozlL{}
public final static int MERGE = 7; k9:|CEP
public final static int IMPROVED_MERGE = 8; 49}WJC7 )
public final static int HEAP = 9; y*US^HJOZ
, `EOJ"|
public static void sort(int[] data) { C-h?#/#?y
sort(data, IMPROVED_QUICK); zfg+gd)Z
} 8IBr#+0
private static String[] name={ ib!TXWq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A:yql`&s
}; h.l.da1#
y c 8h}`
private static Sort[] impl=new Sort[]{ ,\aLv
new InsertSort(), eQn[
new BubbleSort(), ?cKTeGrS
new SelectionSort(), 0) F\aJ4Y
new ShellSort(), Y"yrc0'&T
new QuickSort(), IA]wO%c
new ImprovedQuickSort(), 3Lq9pdM>2@
new MergeSort(), ux| QGT2LY
new ImprovedMergeSort(), ^=1u2YdVw
new HeapSort() -o!bO9vC
}; U0{)goN.
%^nNt:N0
public static String toString(int algorithm){ Em5,Zr_
return name[algorithm-1]; u%I%4 gM
} #e,TS`"eD
kp}[nehF
public static void sort(int[] data, int algorithm) { s@y;b0$gk
impl[algorithm-1].sort(data); g#7Q-n3^
} }&2,!;"">3
v9S=$Aj
public static interface Sort { `8Ych@f]
public void sort(int[] data); uwZ,l-6T
} <o*b6m%
6-J}ZfGj
public static void swap(int[] data, int i, int j) { y'>JT/Q5
int temp = data; o8hE.pf&
data = data[j]; 6?C';1
data[j] = temp; dG]B-(WTC
} ?K:.Pa
} c=9A d