[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; #l+U(zH:JG
} xQ^zX7
int i1=l; $3W[fC
int i2=mid+1; ygWo9?
for(int cur=l;cur<=r;cur++){ iZwt,)(
if(i1==mid+1) UOy`N~\gh+
data[cur]=temp[i2++]; N'i%9SBcg
else if(i2>r) a5:YP
data[cur]=temp[i1++]; a~9U{)@F
else if(temp[i1] data[cur]=temp[i1++]; nRPy)L{
else f,k'gM{K
data[cur]=temp[i2++]; t(/e~w
} +I;b,p
} 8uchp
xCEEv5(5
} #K"jtAm
7Xw;TA
改进后的归并排序: # ~} 26
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package org.rut.util.algorithm.support; )d2<;c
4T{+R{_Y1
import org.rut.util.algorithm.SortUtil; #78p#E
.`)\GjDv
/** m5v9:5{
* @author treeroot XWf8ZZj
* @since 2006-2-2 6 GO7[?U<
* @version 1.0 m`}! dBi
*/ 8G6PcTqv"
public class ImprovedMergeSort implements SortUtil.Sort { -shS?kV
9H_2Y%_
private static final int THRESHOLD = 10; 8&IsZPq%l
\=kH7 !
/* T\{ on[O
* (non-Javadoc) \rF6"24t6
* Nh^T,nv*l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X2}\i5{
*/ hJ (Q^Z
public void sort(int[] data) { 5IOOVYl
int[] temp=new int[data.length]; `{gkL-
mergeSort(data,temp,0,data.length-1); lQ<2Vw#Yl
} rh5R kiF~
=!*e; L
private void mergeSort(int[] data, int[] temp, int l, int r) { j#f+0
int i, j, k; N/p9Ws
int mid = (l + r) / 2; 2%m H
if (l == r) 0~iC#lHO
return; ryB^$Kh,,
if ((mid - l) >= THRESHOLD) eB%KXPhMm
mergeSort(data, temp, l, mid); AE={P*g
else 8V`NQS$
insertSort(data, l, mid - l + 1); 9TIyY`2!
if ((r - mid) > THRESHOLD) ,^pM]+NF|
mergeSort(data, temp, mid + 1, r); %[u6<
else Kyt.[" p
insertSort(data, mid + 1, r - mid); !hrXud=#"
9%S{fd\#
for (i = l; i <= mid; i++) { <Bn^+u\
temp = data; : ^F+mQN
} 5x(`z
for (j = 1; j <= r - mid; j++) { AjKP -[
temp[r - j + 1] = data[j + mid]; J;W(}"cFq
} x%pC.0%
int a = temp[l]; g{.>nE^Sc5
int b = temp[r]; :!Wijdq
for (i = l, j = r, k = l; k <= r; k++) { I?YTX
if (a < b) { Dd-;;Y1C
data[k] = temp[i++]; +FfT)8@W
a = temp; \_Nr7sc\
} else { 5+vCuVZ
data[k] = temp[j--]; |Zr5I";
b = temp[j]; ;5:g%Dt
} &tB|l_p_-p
} 4EQ7OGU
} MqGF~h|+
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/** 'b:e`2fl
* @param data ;2Db/"`t
* @param l e^&QT
* @param i 'YIFHn$!
*/ M$DJ$G|Z
private void insertSort(int[] data, int start, int len) { {hGr`Rh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +c.A|!-
} l=8)_z;~D
} 9uV/G7Geq
} \(Dq=UzQI
} xphw0Es
(#Z2
堆排序： ,],"tzKtE
K QXw~g?
package org.rut.util.algorithm.support; 8 !Pk1P
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import org.rut.util.algorithm.SortUtil; w$n\`rQ
sOg@9-_Uh
/** S(9Xbw)T
* @author treeroot [HI&>dm=$
* @since 2006-2-2 ]wh8m1
* @version 1.0 I<e[/#5P\`
*/ /d=i0E3
public class HeapSort implements SortUtil.Sort{ r=Z#"68$
,Xs%Cg_Ig
/* (non-Javadoc) vo)pT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4!p~Mr[E
*/ 7Fw`s@/%
public void sort(int[] data) { u*B.<GmN
MaxHeap h=new MaxHeap(); 0,)B~|+
h.init(data); W{O:j
for(int i=0;i h.remove(); 8J{I6nPF
System.arraycopy(h.queue,1,data,0,data.length); 8>S"aHt 7
} L&=j O0_
A`v(hBM
private static class MaxHeap{ %VOn;_Q*B
F]]np&UV.
void init(int[] data){ ,B%M P<Rz1
this.queue=new int[data.length+1]; xB_F?d40T5
for(int i=0;i queue[++size]=data; #/$}zl
fixUp(size); ["- pylhK
} ;j])h!8X
} k@JDG]R<{
<MZ$baK
private int size=0; &dF$:$'s
Rn~FCj,-
private int[] queue; vZj^&/F$=g
mA}-hR%
public int get() { Q}FDu,
return queue[1]; J\<7M8
} ^'.=&@i-
>8Wvz.Nq/
public void remove() { JYL/p9K[I
SortUtil.swap(queue,1,size--); $gT+Ue|7
fixDown(1); jXvGL
} 3p{N7/z(
file://fixdown )k01K,%#)
private void fixDown(int k) { pA%XqG*=Y
int j; lS]<~
while ((j = k << 1) <= size) { $3S6{"
if (j < size %26amp;%26amp; queue[j] j++; j89|hG)2
if (queue[k]>queue[j]) file://不用交换 tRRPNY
break; LuY`mi
SortUtil.swap(queue,j,k); %[\: 8
k = j; jK/2n}q&]
} H1_XEcaM+*
} s|rlpd4y
private void fixUp(int k) { (__=*ew
while (k > 1) { 4)BZ%1+
int j = k >> 1; bhe~ekb
if (queue[j]>queue[k]) D.Rk{0se8
break; .NcoST9a
SortUtil.swap(queue,j,k); wLC!vX.S
k = j; wH=
} 4@OnMj{M
} G7 >
rs{e6
} !Rk1q&U5
y ,isK
} `l@[8H%aw
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SortUtil： fx %Y(W#5
0#4_vg .
package org.rut.util.algorithm; ;l> xXSB7$
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import org.rut.util.algorithm.support.BubbleSort; _a@&$NEox
import org.rut.util.algorithm.support.HeapSort; (rO_Vfaa
import org.rut.util.algorithm.support.ImprovedMergeSort; F>jPr8&
import org.rut.util.algorithm.support.ImprovedQuickSort; V&vU her0
import org.rut.util.algorithm.support.InsertSort; E]w1!Ah M
import org.rut.util.algorithm.support.MergeSort; 'Wjuv9)/
import org.rut.util.algorithm.support.QuickSort; H `y.jSNi
import org.rut.util.algorithm.support.SelectionSort; v1<gNb)`
import org.rut.util.algorithm.support.ShellSort; `bu3S}m7
Af1izS3
/** ~R/w~Kc!/A
* @author treeroot _H}y7
* @since 2006-2-2 %])-+T
* @version 1.0 y[[f?rxz>
*/ H .)}|
public class SortUtil { DLcfOOn1I
public final static int INSERT = 1; JPfNf3<@My
public final static int BUBBLE = 2; wVkms
public final static int SELECTION = 3; IK5FSN]s/
public final static int SHELL = 4; L,!?'.*/]
public final static int QUICK = 5; #m?GBr%k
public final static int IMPROVED_QUICK = 6; W[PZQCL}K)
public final static int MERGE = 7; @Tb T
public final static int IMPROVED_MERGE = 8; 9|WBJ6
public final static int HEAP = 9; _'<V<OjVM!
g0Qg]F5D~
public static void sort(int[] data) { - {<`Z
sort(data, IMPROVED_QUICK); !O F#4N
} ~r;da9
private static String[] name={ 5MV4N[;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _d6mf4M]5
}; -B:Z(]3#\
FP<RoA?W
private static Sort[] impl=new Sort[]{ KJWYG^zI
new InsertSort(), 9+@"DuYc6
new BubbleSort(), P`6 T;|VDk
new SelectionSort(), {`QF(WL
new ShellSort(), ^Dhj<_
new QuickSort(), o^dt# &
new ImprovedQuickSort(), S+H#^WSt
new MergeSort(), c\FyX\i
new ImprovedMergeSort(), Sxf|gDC
new HeapSort() !e@G[%k
}; rubqk4
}'$6EgX
public static String toString(int algorithm){ GlP [:
return name[algorithm-1]; S_LY>k?
} vb/*ILS
G~_5E]8
public static void sort(int[] data, int algorithm) { HVz-i{M
impl[algorithm-1].sort(data); F48:mfj1r
} F7a &-
NHA 2 i
public static interface Sort { Gir_.yc/
public void sort(int[] data); 9\3%5B7
} #b\&Md|;
cd{3JGgB
public static void swap(int[] data, int i, int j) { 8yz A W&q
int temp = data; GDw4=0u-
data = data[j]; )|,-l^lC
data[j] = temp; zYpIG8"o5
} o O%!P<D
} Jpg_$~k