[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; "jR]MZ
} HzvlF0f
int i1=l; ,=|4:F9
int i2=mid+1; ` W4dx&
for(int cur=l;cur<=r;cur++){ rjUBLY1(
if(i1==mid+1) CWi8Fv
data[cur]=temp[i2++]; 0(gq;H5x'
else if(i2>r) QU/fT_ORw
data[cur]=temp[i1++]; E-fr}R}
else if(temp[i1] data[cur]=temp[i1++]; QHzgy?
else z(me@P!D~
data[cur]=temp[i2++]; DyfsTx
} Mra35
} F;u_7OM
O*G1 QX
} l~J*' m2
IU#x[P!
改进后的归并排序: ?TpUf
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package org.rut.util.algorithm.support; Zu21L3
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import org.rut.util.algorithm.SortUtil; -$JO8'TP
b,@aqu
/** C>X|VP|C
* @author treeroot ]^K;goQv
* @since 2006-2-2 *HE^1IEl
* @version 1.0 /0lC KU!=
*/ S~)w\(r
public class ImprovedMergeSort implements SortUtil.Sort { z/7$NxJH
3;_ n{&
private static final int THRESHOLD = 10; -(#-I$z
LA4<#KP
/* ;`(R7X *3
* (non-Javadoc) MBw-*K'?zB
* 8IGt4UF&?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _1|$P|$P.
*/ /L v1$~
public void sort(int[] data) { dMvp&M\\'
int[] temp=new int[data.length]; #BY`h~&T
mergeSort(data,temp,0,data.length-1); #@qN8J}R
} OeElMRU"
SfB8!V|;
private void mergeSort(int[] data, int[] temp, int l, int r) { zO~9zlik
int i, j, k; +e P.s_t
int mid = (l + r) / 2; por/^=e{Y
if (l == r) qX#MV>1
return; s_ bR]G
if ((mid - l) >= THRESHOLD) dqc1q:k?$
mergeSort(data, temp, l, mid); gR Nv-^
else 8SC%O\,
insertSort(data, l, mid - l + 1); "aq'R(/`c
if ((r - mid) > THRESHOLD) p&N#_dmlH
mergeSort(data, temp, mid + 1, r); oyx^a9
else E m{aM
insertSort(data, mid + 1, r - mid); XOy2lJ/
w%a8XnW]1
for (i = l; i <= mid; i++) { ~/-eyxLTm
temp = data; -rSIBc:$8
} {fDTSr?/
for (j = 1; j <= r - mid; j++) { vF4]ux&
temp[r - j + 1] = data[j + mid]; kV&9`c+
} x,8<tSW)Z
int a = temp[l]; UiQEJXwnz
int b = temp[r]; nFM@@oA
for (i = l, j = r, k = l; k <= r; k++) { Ne6}oQy(S`
if (a < b) { 60}! LmL
data[k] = temp[i++]; 9$1)k;ChP/
a = temp; 9em*r9-
} else { {1-V]h.<J
data[k] = temp[j--]; iwF9[wAft
b = temp[j]; iL]'y\?lv
} 6'C2SihYp
} Y[ zZw~yx
} V[;M&=,"
y\c"b-lQX
/** ,Zf 9RM
* @param data o[\HOe~;
* @param l p9qKLJ*.C
* @param i $m| V :/
*/ v;EQ, NL
private void insertSort(int[] data, int start, int len) { <a^Oj LLU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BR5BJX
} LT@OWH
} 1X1 NtS@
} Pm{*.AW1
} T*[ VY1
w:i:~f .
堆排序： )?aaBaN$
C$yq\C+I
package org.rut.util.algorithm.support; e Y$qV}
Uh6 '$0
import org.rut.util.algorithm.SortUtil; 1B=>_3_
,*svtw:2')
/** !Ng=Yk>3
* @author treeroot 8wZf]_
* @since 2006-2-2 PWr(*ZP>hI
* @version 1.0 =8{WZCW5
*/ +A8j@d#:
public class HeapSort implements SortUtil.Sort{ MGpt}|t-
;#/@+4@a&
/* (non-Javadoc) G$M9=@Ug
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'lz"2@4{
*/ 0(TTw(;
public void sort(int[] data) { RFaSwf,5n
MaxHeap h=new MaxHeap(); Z|lU8`'5
h.init(data); s1N?/>lmB
for(int i=0;i h.remove(); vGy8Qu>
System.arraycopy(h.queue,1,data,0,data.length); 9xI GV!
} zYER
lSwcL
private static class MaxHeap{ ,:Z^$
O[^%{'
void init(int[] data){ oqd;6[%G
this.queue=new int[data.length+1]; _qwQ;!9
for(int i=0;i queue[++size]=data; ;,h/
fixUp(size); %ysZ5:X
} CY:d`4
} ~uWOdm-"[
13k !'P
private int size=0; !^oV #
g|X;ahTT
private int[] queue; g=L]S-e
V9yl4q-bL
public int get() { s^Nw%KAv
return queue[1]; - YqYcer
} b}^S.;vNj
LpbsYl
public void remove() { v X~RP *
SortUtil.swap(queue,1,size--); $ ,Ck70_
fixDown(1); mEG6
} uF|3/x=
file://fixdown n.MRz WJpZ
private void fixDown(int k) { gmKGy@]
int j; S0,R_d')
while ((j = k << 1) <= size) { nQX+pkJ
if (j < size %26amp;%26amp; queue[j] j++; (IqZ@->nw
if (queue[k]>queue[j]) file://不用交换 /1=4"|q>h'
break; Rd \.:u
SortUtil.swap(queue,j,k); c,MOv7{x_
k = j; 7cP@jj
} <*ZJaBwWU~
} 4rT*tW"U
private void fixUp(int k) { `3H4Ajzcc
while (k > 1) { } p FQRSOZ
int j = k >> 1; C@ZK~Y_g
if (queue[j]>queue[k]) 96cJ8I8
break; $,=6[T!z+e
SortUtil.swap(queue,j,k); 8H,4kY?Z
k = j; z}QwP~Z
} lf{e[!ML'
} ~)LH='|h\}
E907fX[R~
} {R<Ea @LV+
>zsid:
} /-_=nf}w
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SortUtil： |:[tNs*,O
+CH},@j
package org.rut.util.algorithm; K;?,FlH
c .3ZXqpI;
import org.rut.util.algorithm.support.BubbleSort; ,u }XWV
import org.rut.util.algorithm.support.HeapSort; ^H{R+}
import org.rut.util.algorithm.support.ImprovedMergeSort; (/!r(#K0,'
import org.rut.util.algorithm.support.ImprovedQuickSort; #4MBoN(3
import org.rut.util.algorithm.support.InsertSort; <9E0iz+j
import org.rut.util.algorithm.support.MergeSort; ptatzp]c#
import org.rut.util.algorithm.support.QuickSort; 5Wyz=+?m|
import org.rut.util.algorithm.support.SelectionSort; 6vuq1
import org.rut.util.algorithm.support.ShellSort; [Aj Q#;#Q
jUv!9Y}F
/** 4(e59ZgY
* @author treeroot ;__9TN
* @since 2006-2-2 ~vmdXR`'T
* @version 1.0 7Dzuii?1
*/ h5%<+D<
public class SortUtil { +;$oJJ
public final static int INSERT = 1; x";w%
public final static int BUBBLE = 2; t*z~5_/
public final static int SELECTION = 3; 'E/*d2CDM(
public final static int SHELL = 4; 0iULCK
public final static int QUICK = 5; tO7v4
public final static int IMPROVED_QUICK = 6; LTNj| u
public final static int MERGE = 7; 3!Sp0P
public final static int IMPROVED_MERGE = 8; :q8b;*:
public final static int HEAP = 9; 3czeTj
P71(
public static void sort(int[] data) { IdYzgDH
sort(data, IMPROVED_QUICK); ] h-,o R?e
} S6}@I ,Q
private static String[] name={ ,fK3ZC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "|;:>{JC
}; V/cP4{L
rG#Z=*b%
private static Sort[] impl=new Sort[]{ /? r?it
new InsertSort(), >AoK/(yL.
new BubbleSort(), A+y
new SelectionSort(), ;\EiM;Q]
new ShellSort(), WZOY)>K
new QuickSort(), l"\~yNgk
new ImprovedQuickSort(), ]k9)G*
new MergeSort(), mNmLyU=d
new ImprovedMergeSort(), {x'GJtpb
new HeapSort() V.os
}; O: @}lK+H
NCxqh<
public static String toString(int algorithm){ -':Y\:W
return name[algorithm-1]; Hzrtlet
} ;a-$D]Db
~m|Mg9-
public static void sort(int[] data, int algorithm) { KIR'$ 6pn~
impl[algorithm-1].sort(data); M?=;JJ:
} [V4{c@
*),8PoT
public static interface Sort { OB[o2G<0
public void sort(int[] data); 'n<iU st
} nz9DLAt
y5Tlpi`g
public static void swap(int[] data, int i, int j) { GUF"<k
int temp = data; K3\#E/Ox
data = data[j]; gp$Ucfu'
data[j] = temp; 8$(Dz]v|[&
} !61Pl/uQ
} !LkWzn3