[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; 7[0k5-
} W2Z]?l;vQQ
int i1=l; Jxw:Jk ~
int i2=mid+1; U (7P X`1
for(int cur=l;cur<=r;cur++){ Y[?Wt/O;
if(i1==mid+1) arL&^]JnZ,
data[cur]=temp[i2++]; G6VHl:e7z
else if(i2>r) 8%f! X51
data[cur]=temp[i1++]; U(LR('-h
else if(temp[i1] data[cur]=temp[i1++]; |L{dQ)-'l
else !Y(qpC:$
data[cur]=temp[i2++]; ;]x5;b9`
} 6YGr"Kj &
} 7]zZha4X
5mVu]T`
} !sQ8,l0h
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改进后的归并排序: K -1~K
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package org.rut.util.algorithm.support; n(S-F g
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import org.rut.util.algorithm.SortUtil; (k.7q~:
e-=PT1T`
/** {5-{f=Rk
* @author treeroot S*s9?
* @since 2006-2-2 G{=$/&St
* @version 1.0 =Fl4tY#X
*/ wh+ibH}@!
public class ImprovedMergeSort implements SortUtil.Sort { gdNp2b
7/!C
private static final int THRESHOLD = 10; K):sq{
:#jv4N
/* jk}PucV
* (non-Javadoc) &bu`\|V
* `.WKU"To
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oe"ShhT
*/ 4\es@2q
public void sort(int[] data) { /loNOutw
int[] temp=new int[data.length]; :]hfmWC
mergeSort(data,temp,0,data.length-1); 1V?)zp
} aZ,Wa-k
4FdH:os
private void mergeSort(int[] data, int[] temp, int l, int r) { )E2Lf]
int i, j, k; &r!>2$B\
int mid = (l + r) / 2; /*HSAjv
if (l == r) H9!*DA<W
return; L$Z_j()2
if ((mid - l) >= THRESHOLD) zZiVBUmE<
mergeSort(data, temp, l, mid); JdEb_c3S
else _'a4I;
insertSort(data, l, mid - l + 1); x^BBK'
if ((r - mid) > THRESHOLD) h(sKGCG
mergeSort(data, temp, mid + 1, r); S-|$sV^cG
else Ooy96M~_G
insertSort(data, mid + 1, r - mid); 6mLE-( Z7
CZ}tQx5ga
for (i = l; i <= mid; i++) { 7B`0mK3
temp = data; c7wgjQ[
} QNEaj\
for (j = 1; j <= r - mid; j++) { a9-;8`fCR
temp[r - j + 1] = data[j + mid]; DR8dJ#
} <:-&yDh u
int a = temp[l]; !iqz 4E
int b = temp[r]; ,#Y".23G
for (i = l, j = r, k = l; k <= r; k++) { (6'Hzl^Kp
if (a < b) { gk%ye&:f
data[k] = temp[i++]; P'k39
a = temp; Wfy+7$14M
} else { hp}8 3.oA
data[k] = temp[j--]; O0RQ}~$'m
b = temp[j]; k{62UaL.
} w2GY,,R
} Ta$<#wb
} I9m
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/** 30"G%DFd
* @param data +P.Ir
* @param l ;ecF~-oku
* @param i ElxbHQj6
*/ n1h+`nsf
private void insertSort(int[] data, int start, int len) { rD?o97
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]A[~2]
} C?k4<B7V
} m^KkS
} ?zqXHv#x
} Gr?gHAT
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堆排序： *L_wRhhk
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package org.rut.util.algorithm.support; p9J(,}
l[Oxf|
import org.rut.util.algorithm.SortUtil; X3vrD{uNU
`h#JDcT;a
/** .~']gih#
* @author treeroot 2e&Zs%u
* @since 2006-2-2 mi?Fy0\
* @version 1.0 s!Vtwp9
*/ yMxS'j1
public class HeapSort implements SortUtil.Sort{ i8F~$6C
1'U-n{fD
/* (non-Javadoc) :+n7oOV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5Jp>2d
*/ M Cz3RZK
public void sort(int[] data) { k9 E?5
MaxHeap h=new MaxHeap(); ruVm8BO
h.init(data); K\PS$
for(int i=0;i h.remove(); x($1pAE
System.arraycopy(h.queue,1,data,0,data.length); xgVt0=q
} i7_BnJJX{B
N]~q@x;<)3
private static class MaxHeap{ fpUX @b
"]% L{aP
void init(int[] data){ 89l}6p/L
this.queue=new int[data.length+1]; ^z1WPI
for(int i=0;i queue[++size]=data; APya&TG
fixUp(size); -xXM/3g1u
} h2y@xnn
} UHHe~L
JdnZY.{S0
private int size=0; ):\L#>:w
EP @=i
private int[] queue; a<Ta*:R$0
@<+(40`*
public int get() { 'tc$#f^:
return queue[1]; $xqphhBg
} F-t-d1w6
P`0aU3pl
public void remove() { Z(FAQ\7
SortUtil.swap(queue,1,size--); >r3Wo%F'
fixDown(1); s_|wvOW)'
} {^v50d
file://fixdown ^H>vJT
private void fixDown(int k) { {k>m5L
int j; ;J<kG@
while ((j = k << 1) <= size) { :&]%E/
if (j < size %26amp;%26amp; queue[j] j++; : f Wh7X3
if (queue[k]>queue[j]) file://不用交换 yl*S|= 8;k
break; DvGtO)5._
SortUtil.swap(queue,j,k); &c'unKH
k = j; -$*YN{D+
} }x+{=%~N
} &Jj?C
private void fixUp(int k) { &p*N8S8
while (k > 1) { nt7ui*k
int j = k >> 1; _-^@Jx[
if (queue[j]>queue[k]) {.sF&(e
break; zOcMc{w0
SortUtil.swap(queue,j,k); /bVI'fT
k = j; .w`8_v&Y
} J{91 t |
} kZ2+=/DYN
eL],\\q
} uE>}>6)b
tG6 o^
} {3?g8e]zr
E:%%Dm
SortUtil： A%Ao yy4E
NLj0\Pz|B
package org.rut.util.algorithm; Z#0z#M`
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import org.rut.util.algorithm.support.BubbleSort; 'tOo0Zgc
import org.rut.util.algorithm.support.HeapSort; Pai{?<zGi
import org.rut.util.algorithm.support.ImprovedMergeSort; VF4F7'
import org.rut.util.algorithm.support.ImprovedQuickSort; ks! G \<I
import org.rut.util.algorithm.support.InsertSort; ,}bC
import org.rut.util.algorithm.support.MergeSort; 45#`R%3
import org.rut.util.algorithm.support.QuickSort; w>#~_x,`
import org.rut.util.algorithm.support.SelectionSort; +Q{jV^IT9
import org.rut.util.algorithm.support.ShellSort; -Q,lUP
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/** F3?v&
* @author treeroot V&gUxS]*
* @since 2006-2-2 :Y"f.>
* @version 1.0 4ed( DSN
*/ qsJo)SA
public class SortUtil { Ly3^zFW
public final static int INSERT = 1; |*!I(wm2i
public final static int BUBBLE = 2; z\v\T|C
public final static int SELECTION = 3; 5}1cNp6@
public final static int SHELL = 4; rZ^DiFR
public final static int QUICK = 5; QjPcfR\
public final static int IMPROVED_QUICK = 6; ' e-FJ')|
public final static int MERGE = 7; QkA79%;j
public final static int IMPROVED_MERGE = 8; [ %r :V"
public final static int HEAP = 9; b-wFnMXk+
D:%v((Ccw
public static void sort(int[] data) { (fq>P1-
sort(data, IMPROVED_QUICK); ~$+9L2gz
} K2!KMhvQ
private static String[] name={ z[vMO%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (CEJg|,
}; I'C{=?
ybfNG@N*
private static Sort[] impl=new Sort[]{ &B[$l`1
new InsertSort(), ?QZ\KY
new BubbleSort(), Lt_7pb%
new SelectionSort(), T*z >A
new ShellSort(), O||M |
new QuickSort(), I#m5Tl|#
new ImprovedQuickSort(), .HMO7n6)8l
new MergeSort(), H!,#Z7s
new ImprovedMergeSort(), %3Y&D]
new HeapSort() 6kHAoERp
}; iN_G|w[d
!J.qH%S5
public static String toString(int algorithm){ m7fmQUk
return name[algorithm-1]; ze]2-B4
} ;A1pqHr
Ig]Gg/1G
public static void sort(int[] data, int algorithm) { qbmy~\ZY
impl[algorithm-1].sort(data); t(^c]*r~
} POdG1;)
5PG%)xff*
public static interface Sort { :v=Yo
public void sort(int[] data); <kt,aMw[*
} (eSa{C\
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public static void swap(int[] data, int i, int j) { (`xhh
int temp = data; G=(F-U;*
data = data[j]; C;M.dd
data[j] = temp; nxCwg>
} rk{DrbRx
} <1>\?$)D