[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; 6~w@PRy
} N//KPh
int i1=l; #O dJ"1A|
int i2=mid+1; *bA.zmzM
for(int cur=l;cur<=r;cur++){ O@C@eW#
if(i1==mid+1) E=!\z%4
data[cur]=temp[i2++]; >I&5j/&}+
else if(i2>r) @6T/Tdz
data[cur]=temp[i1++]; ^$hH1H+V
else if(temp[i1] data[cur]=temp[i1++]; pcWPH.
else v^ VitLC
data[cur]=temp[i2++]; :G%61x&=Zc
} $ gS>FJ
} @2 fg~2M1
f=K]XTw~
} :&9s,l
DlMW(4(
改进后的归并排序: 81 sG
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package org.rut.util.algorithm.support; wD'SPk5S?
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import org.rut.util.algorithm.SortUtil; W v+?TEP
A{D];pE`
/** Fy-t T]Q9
* @author treeroot ?2Py_gkf
* @since 2006-2-2 wEvVL
* @version 1.0 P me^l%M
*/ bB3powy9
public class ImprovedMergeSort implements SortUtil.Sort { UrEs4R1#
:E )>\&
private static final int THRESHOLD = 10; Qjv}$`M
bAtSVu
/* *wB1,U{
* (non-Javadoc) 5taT5?n2
* e h?zNu2=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P?of<i2E
*/ ^sLdAC
public void sort(int[] data) { Cd}<a?m,
int[] temp=new int[data.length]; 68WO~*
mergeSort(data,temp,0,data.length-1); CdjI`
} lchPpm9
*mvlb (' &
private void mergeSort(int[] data, int[] temp, int l, int r) { t=W}SH
int i, j, k; mSl.mi(JiZ
int mid = (l + r) / 2; Trz@~d/[,n
if (l == r) ok\vQs(a
return; hy"\RW
if ((mid - l) >= THRESHOLD) 0[?Xxk}s0
mergeSort(data, temp, l, mid); ?QdWrE_
else .;`AAH'k
insertSort(data, l, mid - l + 1); _TQj~W<
if ((r - mid) > THRESHOLD) }l} Bo.C
mergeSort(data, temp, mid + 1, r); t)$:0
else "n5N[1bk
insertSort(data, mid + 1, r - mid); Ig0VW)@
aNspMJ
for (i = l; i <= mid; i++) { 5IjGm
temp = data; |~mOfuQb
} ra gXn
for (j = 1; j <= r - mid; j++) { O`t&ldU
temp[r - j + 1] = data[j + mid]; l L@XM2"
} ,w:U#r~s"
int a = temp[l]; sLT3Y}IO
int b = temp[r]; !9VY|&fHe
for (i = l, j = r, k = l; k <= r; k++) { -3Z,EaG^
if (a < b) { O23k:=Av
data[k] = temp[i++]; q Y?j#fzi
a = temp; O^duZ*b
} else { a![{M<Y~
data[k] = temp[j--]; IDriGZZ<)6
b = temp[j]; h_,i&d@(
} xHLlMn4M
} r1{@Ucw2
} ">,|V-H
ag;pN*z
/** oDAXiY$u
* @param data g(7rTyp4)
* @param l ?ri?GmI|
* @param i 9Uekvs=r=M
*/ 2*l/3VW
private void insertSort(int[] data, int start, int len) { ~t~k2^)|"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q1I6$8:7
} W/bQd)Jvk
} Ee%%d
} Q6!zZ))~
} z3m85F%dR
u?<%q!
堆排序： yfjWbW
u$Jz~:=,
package org.rut.util.algorithm.support; 6@F9G4<Z
sW'AjI
import org.rut.util.algorithm.SortUtil; 17"uf.G
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/** ' ;FnIZ
* @author treeroot Ma']?Rb`
* @since 2006-2-2 S3*`jF>q
* @version 1.0 h-K_Lr]
*/ vm7z,FfN
public class HeapSort implements SortUtil.Sort{ =M[bnq*\
lc1(t:"[
/* (non-Javadoc) qUW! G&R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4=.89T#<
*/ m{cGK`/\
public void sort(int[] data) { CMG&7(MR
MaxHeap h=new MaxHeap(); #3@rS
h.init(data); g-</ua(j
for(int i=0;i h.remove(); DIfaVo/"
System.arraycopy(h.queue,1,data,0,data.length); JWhdMU
} :tB1D@Cb6
Val|n*%
private static class MaxHeap{ :W.(S6O(
p\tm:QWD;
void init(int[] data){ kY|utoAP
this.queue=new int[data.length+1]; rIu$pZO
for(int i=0;i queue[++size]=data; S\YTX%Xm}
fixUp(size); gw3K+P
} %G/hD
} ^?7-r6
+-U- D?-
private int size=0; Rn(ec
< #}5IQ5`Z
private int[] queue; ~IfJwBn-i
tGh~!|P
public int get() { aFb==73aLw
return queue[1]; .B]MpmpK
} bz2ztH9 n
i$:*Pb3mV
public void remove() { #@9/g
SortUtil.swap(queue,1,size--); *K6g\f]b#
fixDown(1); FaQe_;
} b_#m}yZ6
file://fixdown gmO!
private void fixDown(int k) { ll<Xz((o
int j; oim9<_
while ((j = k << 1) <= size) { t?x<g<PJ4
if (j < size %26amp;%26amp; queue[j] j++; wOEj)fp.
if (queue[k]>queue[j]) file://不用交换 DJXmGt]
break; +ocol6G7W
SortUtil.swap(queue,j,k); \378rQU
k = j; 0w\zLU
} %S@ZXf~:
} Pg0x/X{t
private void fixUp(int k) { mzaWST]
while (k > 1) { vv3* j&I
int j = k >> 1; 0d"[l@UU0
if (queue[j]>queue[k]) 7$vYo _
break; a LroD$#
SortUtil.swap(queue,j,k); mPtZO*Fc
k = j; EyD=q! ZVZ
} q77;ZPfs8
} /ivJsPH
Pmr5S4Ka
} 6S'yZQ|b
8>2.UrC
} j9x<Y]
fcRxp{*zO
SortUtil： 'RQ+g}|Ba!
7a=gH2]&
package org.rut.util.algorithm; L%*!`TN
hYT0l$Ng
import org.rut.util.algorithm.support.BubbleSort; W#4 7h7M
import org.rut.util.algorithm.support.HeapSort; ]YnD
import org.rut.util.algorithm.support.ImprovedMergeSort; \=?a/
import org.rut.util.algorithm.support.ImprovedQuickSort; fNli
import org.rut.util.algorithm.support.InsertSort; Xtq_y'I
import org.rut.util.algorithm.support.MergeSort; l6T-}h:=
import org.rut.util.algorithm.support.QuickSort; UqFO|r"M
import org.rut.util.algorithm.support.SelectionSort; ^pAAzr"hv
import org.rut.util.algorithm.support.ShellSort; E"\<s3
%Q__!D[
/** xjuN-
* @author treeroot d6?j`~[7#-
* @since 2006-2-2 ]_mb7X>
* @version 1.0 EnKR%Ctw
*/ _UMg[Um
public class SortUtil { 8\@m - E!{
public final static int INSERT = 1; :}L[sl\R
public final static int BUBBLE = 2; U8s2|G;K
public final static int SELECTION = 3; !=*g@mgF
public final static int SHELL = 4; sQUM~HD\a
public final static int QUICK = 5; ="1Ind@w!
public final static int IMPROVED_QUICK = 6; {nBhdM:i
public final static int MERGE = 7; >\-hO&%_
public final static int IMPROVED_MERGE = 8; :KSV4>X[%a
public final static int HEAP = 9; rKe2/4>0X
fy>{QC\
public static void sort(int[] data) { aD<A.Lhy
sort(data, IMPROVED_QUICK); v+W&9>
} )al]*[lY
private static String[] name={ VZp5)-!\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !_]Y~[
}; O@T9x$
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private static Sort[] impl=new Sort[]{ 1![!+X:w
new InsertSort(), G, }Yl
new BubbleSort(), }/0X'o
new SelectionSort(), \#2Z)Kz
new ShellSort(), j"t(0m
new QuickSort(), 0cv{
new ImprovedQuickSort(), g+8OekzB5
new MergeSort(), /QK6Rac-
new ImprovedMergeSort(), uanhr)Ys
new HeapSort() 8l>?Pv
}; 6C1#/
%^)fmu
public static String toString(int algorithm){ L\6M^r >
return name[algorithm-1]; -V*R\,>
} GL>O4S<`
afCW(zHp
public static void sort(int[] data, int algorithm) { yJ[0WY8<kC
impl[algorithm-1].sort(data); QGMV}y
} <O(4TO
\0^Kram>
public static interface Sort { $P >
public void sort(int[] data); n2"a{Ofhlf
} paA(C|%{
AwCcK6N1
public static void swap(int[] data, int i, int j) { 6iry6wcHm
int temp = data; l] K3Y\#bP
data = data[j]; {X!r8i
data[j] = temp; =}<IfNA
} 3<e=g)F
} Yj<a" Gr4[