[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; :CaTP%GW
} X|b2c+I
int i1=l; }>}1oUCi
int i2=mid+1; &[_ZXVva~
for(int cur=l;cur<=r;cur++){ -7%X]
if(i1==mid+1) %d;<2b0
data[cur]=temp[i2++]; .9h)bf+
else if(i2>r) ,l HLH
data[cur]=temp[i1++]; !msNEE@[
else if(temp[i1] data[cur]=temp[i1++]; [i7YVwG4
else |QMA@Mx
data[cur]=temp[i2++]; [2 zt ^
} $^_|j1z#i
} WUEHB
nY_?Jq
} 30Drrno7Io
jL>:>r
改进后的归并排序: >7b)y
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package org.rut.util.algorithm.support; E0l_--
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import org.rut.util.algorithm.SortUtil; wLJ]&puwm
}Qr6l/2
/** WE6\dhJ<
* @author treeroot Ug%_@t/?
* @since 2006-2-2 sL^yB
* @version 1.0 / T c=
*/ b]Z@^<_E
public class ImprovedMergeSort implements SortUtil.Sort { OCV+h'
}< 5F
private static final int THRESHOLD = 10; y\c"b-lQX
xJwG=$o
/* /JJw 6[N
* (non-Javadoc) !#yq@2QX
* u1^wDc*xg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mpw~hW0-
*/ SA"p\}"
public void sort(int[] data) { An`3Ex[
int[] temp=new int[data.length]; b1#dz]
mergeSort(data,temp,0,data.length-1); p#P~Q/;
} U7@AC}.+
,:2'YB
private void mergeSort(int[] data, int[] temp, int l, int r) { c}Z6V1]QP
int i, j, k; 4,Ic}CvM
int mid = (l + r) / 2; &[vw 0N-
if (l == r) 9A'Y4Kg<C
return; 1{x.xi"A/
if ((mid - l) >= THRESHOLD) "r4AY
mergeSort(data, temp, l, mid); - YqYcer
else &)d$t'7p
insertSort(data, l, mid - l + 1); VosZJv=
if ((r - mid) > THRESHOLD) f|7\DeY9U
mergeSort(data, temp, mid + 1, r); ZUm?*.g\^
else \>. LW9
insertSort(data, mid + 1, r - mid); 1/+C5Bp*
XN=67f$Hw
for (i = l; i <= mid; i++) { ,_.I\EY[
temp = data; }Db[ 4
} 3g'S\G@
for (j = 1; j <= r - mid; j++) { %8~Q!=*Iq
temp[r - j + 1] = data[j + mid]; x&sI=5l
} S{t+>/
int a = temp[l]; ?t&kb7
int b = temp[r]; s9;#!7ms
for (i = l, j = r, k = l; k <= r; k++) { 6 gL=u-2
if (a < b) { Rk<@?(l!6x
data[k] = temp[i++]; E51dV:l
a = temp; }_/Hdmmx
} else { q%n6K
data[k] = temp[j--]; gN8hJG'0
b = temp[j]; GYxM0~:$k
} 8H,4kY?Z
} ]B"'}%>ez
} jdZ~z#`(!:
!)"%),>}o
/** RcG0 8p.)
* @param data -H^oXeN
* @param l mYN7kYR}<`
* @param i <#=N m0S$
*/ 9_s6l
private void insertSort(int[] data, int start, int len) { ='ZRfb&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )~4II.`%^
} J?@DGp+t
} O4\Z!R60g
} U@ ?LP
} ;h6v@)#GX
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堆排序： z?/1Kj}xG
omO S=d!o
package org.rut.util.algorithm.support; FuG4F
.;y#
import org.rut.util.algorithm.SortUtil; }jt?|dl1
yzw mT
/** ]xC#rwHUC
* @author treeroot n~"$^Vr
* @since 2006-2-2 <?-YTY|
* @version 1.0 w{[=l6L m
*/ 4%4avEa"w
public class HeapSort implements SortUtil.Sort{ 1_fZm+oW!
'w>_+jLT
/* (non-Javadoc) ~\,w {
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fbyQjvURnC
*/ KoE8Mp
public void sort(int[] data) { T{V/+RM
MaxHeap h=new MaxHeap(); v(*C%.M)
h.init(data); Tus}\0/i>
for(int i=0;i h.remove(); |b-9b&
System.arraycopy(h.queue,1,data,0,data.length); `p;eIt
} M;cO0UIwO
0&qr
private static class MaxHeap{ GoA4f3
z,qRcO&
void init(int[] data){ $vHU$lZ/W
this.queue=new int[data.length+1]; Zfk*HV#\
for(int i=0;i queue[++size]=data; R1nJUOE4w^
fixUp(size); RZM"~ 0
} }I3gU
} G+B~Ix-
M02uO`Y9
private int size=0; 4S~o-`&W
t+5E#!y
private int[] queue; mj|)nOd
j4?@(u9;j
public int get() { q@b|F-
return queue[1]; \V9Z#>
} -.g|l\
NCxqh<
public void remove() { RoCfJ65
SortUtil.swap(queue,1,size--); Hzrtlet
fixDown(1); [:xiZ
} ~m|Mg9-
file://fixdown KIR'$ 6pn~
private void fixDown(int k) { M?=;JJ:
int j; da1]mb=4 5
while ((j = k << 1) <= size) { DI!V^M[~u
if (j < size %26amp;%26amp; queue[j] j++; $P1O>x>LIL
if (queue[k]>queue[j]) file://不用交换 *x)Ozfe
break; UzXE_S
SortUtil.swap(queue,j,k); pO8ePc@=D
k = j; >iS`pb
} Yvn\xph3
} XU+<?%u}z
private void fixUp(int k) { vG \a1H
while (k > 1) { SQeRSz8bK4
int j = k >> 1; YF+n b.0.
if (queue[j]>queue[k]) dw.F5?j`b
break; Wf{O[yL*
SortUtil.swap(queue,j,k); V([~r,
k = j; kdb(I@6
} F4<O2!V
} ?<G]&EK~~]
e/->_T(I
} .VTy[|o
K}6dg<
} Cy*|&=>j
l>Ub!^;
SortUtil： )lJao
F)z;Z6{t4
package org.rut.util.algorithm; ^$&k5e/}C
rDm'Z>nTf
import org.rut.util.algorithm.support.BubbleSort; VCtH%v#S;.
import org.rut.util.algorithm.support.HeapSort; PjN =k;
import org.rut.util.algorithm.support.ImprovedMergeSort; ',GS#~
import org.rut.util.algorithm.support.ImprovedQuickSort; 4t)%<4
import org.rut.util.algorithm.support.InsertSort; %pXAeeSY`;
import org.rut.util.algorithm.support.MergeSort; <C9 XX~
import org.rut.util.algorithm.support.QuickSort; [F5h
import org.rut.util.algorithm.support.SelectionSort; ""s]zNF}
import org.rut.util.algorithm.support.ShellSort; `vc "Q/
b)9'bJRvU
/** S(\9T1DVe
* @author treeroot -=.V '
* @since 2006-2-2 ?<6CFH]
* @version 1.0 l4TpH|k
*/ S1/`th
public class SortUtil { w[6J `
public final static int INSERT = 1; : Sq?a0!S
public final static int BUBBLE = 2; 0%)i<a!_Z
public final static int SELECTION = 3; ~4?9a(>3
public final static int SHELL = 4; V138d?Mm
public final static int QUICK = 5; Z3!f^vAi&
public final static int IMPROVED_QUICK = 6; WD'#5]#Y
public final static int MERGE = 7; 7Sz?S_N/j
public final static int IMPROVED_MERGE = 8; PQ@L+],C
public final static int HEAP = 9; E*?<KZe"
[o*7FEM|<
public static void sort(int[] data) { L28*1]\Jh
sort(data, IMPROVED_QUICK); ;Jd3u -
} 6\61~u~
private static String[] name={ I|# 5NE6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W+*5"h
}; *m2=/Sh
F#|:`$t
private static Sort[] impl=new Sort[]{ ,t)x{I;C)
new InsertSort(), U35AX9/
new BubbleSort(), \;rYo.+
new SelectionSort(), lC=~$c:
new ShellSort(), ;(}V"i7Hu
new QuickSort(), 5wUUx#
new ImprovedQuickSort(), ?8W("W
new MergeSort(), g#]wLm#
new ImprovedMergeSort(), @y31NH(
new HeapSort() waKT{5k
}; "QvmqI>
QMEcQV>
public static String toString(int algorithm){ (|wz7AY2
return name[algorithm-1]; R0oKbs{
} ;W>Y:NCrp
^( Rvk
public static void sort(int[] data, int algorithm) { ]0L&v7[
impl[algorithm-1].sort(data); y1=NF
} b,KcBQ.
*!^<m0
public static interface Sort { X*,Kb(3
public void sort(int[] data); =!m}xdTP
} -gQCn>"
vky.^
public static void swap(int[] data, int i, int j) { A{B/lX)
int temp = data; XNgDf3T
data = data[j]; w>b-} t
data[j] = temp; JJRK7\~$
} #lU9yv
} }-~T<egF