[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; &z@~n
} =wEqI)Td
int i1=l; 6tPgFa#N
int i2=mid+1; C#r1zr6
for(int cur=l;cur<=r;cur++){ Y|NANjEAfm
if(i1==mid+1) s 9Y'MQo*
data[cur]=temp[i2++]; /2!Wy6p
else if(i2>r) 5VU 5kiCt
data[cur]=temp[i1++]; ^rmcyy8;g
else if(temp[i1] data[cur]=temp[i1++]; 'V=i;2mB*
else t@`w}o[#
data[cur]=temp[i2++]; ;w/|5 ;{A;
} NT^m.o~4
} LB1AjNJ
YQ&Ww|xe
} 5p.vo"7
KZ"&c~[
改进后的归并排序: JFyw,p&xB
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package org.rut.util.algorithm.support; Gd:TM]rJ
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import org.rut.util.algorithm.SortUtil; ^*{:;F@
1gA9h-'w
/** Qd %U(|
* @author treeroot w$X"E*~>8
* @since 2006-2-2 DcO$&)Eb
* @version 1.0 }-ly'4=l
*/ s7A3CY]->
public class ImprovedMergeSort implements SortUtil.Sort { `Dck$
Pp*:rA"N
private static final int THRESHOLD = 10; 'UYxVh9D
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/* gH+s)6
* (non-Javadoc) |4J ;s7us
* Z#O )0ou
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ps DY}y\"
*/ \; 9log<Z
public void sort(int[] data) { ,eI2#6w|C
int[] temp=new int[data.length]; 3y[6n$U&
mergeSort(data,temp,0,data.length-1); XYi-o][Mf
} ,G q?
e5g# a}
private void mergeSort(int[] data, int[] temp, int l, int r) { w)#Lu/
int i, j, k; <6 HrHw_
int mid = (l + r) / 2; KI@OEy
if (l == r) 4jOq.j
return; X 5.%e&`
if ((mid - l) >= THRESHOLD) 1Mftq4nq
mergeSort(data, temp, l, mid); A#yZh\#
else U?bQBHIC
insertSort(data, l, mid - l + 1); *{t]fds
if ((r - mid) > THRESHOLD) +b =X~>vZ
mergeSort(data, temp, mid + 1, r); eucacXiZ
else N(6Q`zs
insertSort(data, mid + 1, r - mid); >1}RiOd3
4"om;+\
for (i = l; i <= mid; i++) { I%^Bl:M
temp = data; K1th>!JW'
} 6n|R<DO%\
for (j = 1; j <= r - mid; j++) { p;y\%i_
temp[r - j + 1] = data[j + mid]; Y#VtZTcT
} eWN[EJI<
int a = temp[l]; GOKca%DT=
int b = temp[r]; ,2|(UTv
for (i = l, j = r, k = l; k <= r; k++) { Oc Gg'R7
if (a < b) { mMNT.a
data[k] = temp[i++]; ~t>i+{JKE
a = temp; s=Cu-.~L
} else { vKcZgIR
data[k] = temp[j--]; gB3Tz(!
b = temp[j]; 4Y2!q$}I+
} 8|z@"b l)
} lU`}
} H%peE9>$
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/** (bX77 Xr
* @param data ]O^C'GzZ
* @param l 6m~N2^z
* @param i 4N!Eqw
*/ e5}KzFZmZ
private void insertSort(int[] data, int start, int len) { LLMom.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !kTI@103Wd
} )K.'sX{B
} w1Xe9'$Qb
} j(QK0"z
} fn~Jc~[G|
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堆排序： F['<;}
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package org.rut.util.algorithm.support; `y^tCJ2u*
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import org.rut.util.algorithm.SortUtil; Knjg`f
u ? }T)B
/** hhM?I$t:
* @author treeroot /c&;WlE/n
* @since 2006-2-2 r(VGdG
* @version 1.0 Ft[)m#Dj`
*/ l0v]+>1i:
public class HeapSort implements SortUtil.Sort{ Ag82tDL[u
fF|m~#y
/* (non-Javadoc) f4[Bj{F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4Odf6v,*@
*/ %>mB"Y,
public void sort(int[] data) { [PhT zXt
MaxHeap h=new MaxHeap(); 8fH.E
h.init(data); =o+js;3
for(int i=0;i h.remove(); -~|E(ys
System.arraycopy(h.queue,1,data,0,data.length); )LdS1%
} o6v'`p'
#cAX9LV
private static class MaxHeap{ evLZ<|
&^I2NpT
void init(int[] data){ s?,\aSsU@
this.queue=new int[data.length+1]; '",+2=JJ
for(int i=0;i queue[++size]=data; VQV%1f
fixUp(size); 'KU)]v
} {ch+G~oS
} z~f;5xtI
w vQ.9
private int size=0; Rnd.<jz+Y
%n!7'XF'[
private int[] queue; a9sbB0q-K@
%u@}lG k
public int get() { k0e {c
return queue[1]; m35$4
} M,R**z
N+#lS7
public void remove() { YM`I&!n
SortUtil.swap(queue,1,size--); ~snYf7
fixDown(1); ]iHSUP
} =9;2(<A
file://fixdown Yo^9Y@WDW
private void fixDown(int k) { fhp+Ep!0Y
int j; VmbfwHRWb
while ((j = k << 1) <= size) { +p\+15
if (j < size %26amp;%26amp; queue[j] j++; #$?!P1
if (queue[k]>queue[j]) file://不用交换 "/~KB~bB
break; r/e} DYL&
SortUtil.swap(queue,j,k); )C^@U&h&
k = j; Z<4Du
} +W}dO#
} dSkx*#FEE
private void fixUp(int k) { 9N*!C{VW
while (k > 1) { a?NoNv)&
int j = k >> 1; =kiDW6 JJU
if (queue[j]>queue[k]) 7FYq6wi
break; Tz<@k
SortUtil.swap(queue,j,k); _]"uq/UWp
k = j; }^"#&w3<
} P6~&,a
} G>?'b
p8bAz
} yM`QVO!;
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} YX,xC-37y
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SortUtil： K[s!3.u
(V:)`A_-
package org.rut.util.algorithm; h#?)H7ft
5y8ajae:
import org.rut.util.algorithm.support.BubbleSort; *T:gx:Sg/
import org.rut.util.algorithm.support.HeapSort; =t!$72g\
import org.rut.util.algorithm.support.ImprovedMergeSort; RuBL_Vi
import org.rut.util.algorithm.support.ImprovedQuickSort; U!D\Vd
import org.rut.util.algorithm.support.InsertSort; (|t)MnPfY
import org.rut.util.algorithm.support.MergeSort; =+>^:3cCQ
import org.rut.util.algorithm.support.QuickSort; ^oH!FN`;{
import org.rut.util.algorithm.support.SelectionSort; yh{Wuz=T
import org.rut.util.algorithm.support.ShellSort; LP:U6 Z
j"wbq-n,7
/** em,j>qp
* @author treeroot M7. fz"M
* @since 2006-2-2 F2WMts
* @version 1.0 gVU&Yl~/^
*/ s3+6Z~g'B
public class SortUtil { YH-+s
public final static int INSERT = 1; kXY p.IVA
public final static int BUBBLE = 2; NoD\t(@h
public final static int SELECTION = 3; MB3 0.V/\
public final static int SHELL = 4; j`LvS
public final static int QUICK = 5; \rPT7\ZA
public final static int IMPROVED_QUICK = 6; 03^?+[C
public final static int MERGE = 7; vm4q1!!(
public final static int IMPROVED_MERGE = 8; fNNik7
public final static int HEAP = 9; [&H?--I
3X]\p}]z
public static void sort(int[] data) { 6S6E 1~
sort(data, IMPROVED_QUICK); 8^)K|+_'m
} |C_sP,W
private static String[] name={ w/Ej>OS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !Q" 3B6 86
}; gW_^GrKpI
D`fi\A
private static Sort[] impl=new Sort[]{ zm`^=cV
new InsertSort(), }Pf7YuUZZ
new BubbleSort(), 97~*Z|#<+
new SelectionSort(), 9_5tA'Q
new ShellSort(), dt=5 Pnf[y
new QuickSort(), Lf}@v
new ImprovedQuickSort(), +pMjm&CF
new MergeSort(), MF%>avRj
new ImprovedMergeSort(), PN@[k:5(
new HeapSort() fsVQZ$h73
}; +(9qAB7
oP( Hkp,'
public static String toString(int algorithm){ .-W_m7&}
return name[algorithm-1]; 4zw5?$YWO"
} S/l?wwD
+""8aA
public static void sort(int[] data, int algorithm) { c7$U0JO
impl[algorithm-1].sort(data); //\UthOT
} <u9U%Vsi
SOPQg?'n=V
public static interface Sort { 2n`OcXCh/
public void sort(int[] data); C)Ez>~Z
} kb>/R/,9
bWAVBF
public static void swap(int[] data, int i, int j) { V/jEMJNks
int temp = data; pdQ6/vh
data = data[j]; #[a+m
data[j] = temp; (!0=~x|Z[
} Im\{b=vT
} $A/$M\: