[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; x:`]uOp
} sglYT!O
int i1=l; ,!BiB*
int i2=mid+1; h\k!X/
for(int cur=l;cur<=r;cur++){ GoI3hp(
if(i1==mid+1) ]bG8DEwD
data[cur]=temp[i2++]; `zNvZm-E
else if(i2>r) \$o!M1j
data[cur]=temp[i1++]; uFM]4v3
else if(temp[i1] data[cur]=temp[i1++]; uUUj?%
else OXy>Tlv
data[cur]=temp[i2++]; KJ]:0'T
} pJC@}z^cw
} PK#; \Zw
_7(>0GY
} aHosu=NK
Ctpr.
改进后的归并排序: bDa(@QJ-
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package org.rut.util.algorithm.support; )1%l$W
/ vI sX3v
import org.rut.util.algorithm.SortUtil; JG xuB*}
PiMW29B^
/** @|:_?
* @author treeroot #/NZ0IbHk
* @since 2006-2-2 VC "66\d&
* @version 1.0 eeX^zaKl]
*/ }(h_ztw
public class ImprovedMergeSort implements SortUtil.Sort { >t|u 8/P
=.9L/74@
private static final int THRESHOLD = 10; fRp+-QvE
g@!mV)c97
/* PN ,pEk|
* (non-Javadoc) acgtXfHR
* -s`/5kD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -/:N&6eRb
*/ S}Wj+H;
public void sort(int[] data) { qJ=4HlLno
int[] temp=new int[data.length]; :-B,Q3d
mergeSort(data,temp,0,data.length-1); 0oI3Fb;E
} 0FrmZ$
_&TA|Da
private void mergeSort(int[] data, int[] temp, int l, int r) { %./vh=5)
int i, j, k; H]V@Q~?e
int mid = (l + r) / 2; UPs*{m
if (l == r) ?{W@TY@S
return; 29DYL
if ((mid - l) >= THRESHOLD) gF(aYuk
mergeSort(data, temp, l, mid); MA\"JAP/
else .CI {g2
insertSort(data, l, mid - l + 1); q@K;u[zFK
if ((r - mid) > THRESHOLD) D"^4X'6
mergeSort(data, temp, mid + 1, r); b4GD}kR
else %xtTh]s
insertSort(data, mid + 1, r - mid); a?bSMt}
}W{rDc kv
for (i = l; i <= mid; i++) { Tbl~6P
temp = data; aqq7u5O1r
} w=.w*?>
for (j = 1; j <= r - mid; j++) { PtySPDClj
temp[r - j + 1] = data[j + mid]; %N#8D<ULd
} lP*_dt9
int a = temp[l]; Y4cIYUSc
int b = temp[r]; x8I=I"Sp
for (i = l, j = r, k = l; k <= r; k++) { &kKopJH
if (a < b) { ?-CZJr
data[k] = temp[i++]; ',L>UIXw
a = temp; 0e1W&
} else { ^vXMX^*
data[k] = temp[j--]; }gQ FWT
b = temp[j]; Xx_v>Jn!
} Y!e
} 0|<ER3xkx
} vzl+0"
tu}AJ
/** uMl.}t2uYu
* @param data *I)oDq3
* @param l (uV~1
* @param i Jh2eo+/%
*/ _=9o:F
private void insertSort(int[] data, int start, int len) { EoM}Co
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KI~BjP\e
} QAYhAOS|e
} pI2g\cH>
} LaL.C^K
} o7"2"( =>
mJT<
堆排序： NF`WA-W8@
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package org.rut.util.algorithm.support; ]O'dwC
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import org.rut.util.algorithm.SortUtil; <rd7<@>5D
i$HA@S
/** P6,~0v(S
* @author treeroot ~|+!xh
* @since 2006-2-2 }LLnJl~Z
* @version 1.0 __HPwOCG7
*/ e;KZTH;
public class HeapSort implements SortUtil.Sort{ Mf)0Y~_:R#
5MsE oLg
/* (non-Javadoc) K7 >Z)21
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E6(OEC%,
*/ }t!,{ZryE1
public void sort(int[] data) { a nK7j2
MaxHeap h=new MaxHeap(); 44T>Yp09
h.init(data); F3*]3,&L
for(int i=0;i h.remove(); !e?;f=1+E
System.arraycopy(h.queue,1,data,0,data.length); EsR_J/:Qe
} k,o|"9H
)SG+9!AbMZ
private static class MaxHeap{ @T53%v<5
b~?FV>gl
void init(int[] data){ u/?s_OR
this.queue=new int[data.length+1]; 4naL2 Y!
for(int i=0;i queue[++size]=data; ({=: N
fixUp(size); ['%]tWT9
} LX{[9
} a1]@&Dr
Bw2-4K\"kc
private int size=0; D<9FSxl6
q]F2bo
private int[] queue; T1TKwU8l
b X.S`
public int get() { a f[<[2pma
return queue[1]; QI*Y7R~<
} v;.7-9c*
kL;sA'I:S
public void remove() { [4uTp[U!r
SortUtil.swap(queue,1,size--); <4,hrx&.
fixDown(1); ,4$ZB(\
} 9?c0cwP?
file://fixdown tRU+6D <w
private void fixDown(int k) { ()1\b
int j; Y<%)Im6v/
while ((j = k << 1) <= size) { ;ru=z@
if (j < size %26amp;%26amp; queue[j] j++; f\+MnZ4[Qj
if (queue[k]>queue[j]) file://不用交换 >r+Dl\R
break; Q]WjW'Ry\
SortUtil.swap(queue,j,k); g{K*EL<
k = j; ceN*wkGyB
} S;#S3?G
} +92/0
private void fixUp(int k) { JR/:XYS+
while (k > 1) { b4`t, D
int j = k >> 1; Ara D_D
if (queue[j]>queue[k]) @]r,cPx0Y
break; H8d%_jCr
SortUtil.swap(queue,j,k); *FoH'\=
k = j; 5o;M
} @[{9B6NlV
} ]`%}Q
0#}Ed Q
} $j61IL3+
[@"~'fu0
} I}JC~=`j
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SortUtil： hwkm'$}
po@=$HK
package org.rut.util.algorithm; tU2 8l.
/wplP+w2
import org.rut.util.algorithm.support.BubbleSort; G gmv(!
import org.rut.util.algorithm.support.HeapSort; HGqT"NJr
import org.rut.util.algorithm.support.ImprovedMergeSort; YTH3t] &
import org.rut.util.algorithm.support.ImprovedQuickSort; \9Nd"E[B
import org.rut.util.algorithm.support.InsertSort; $'D|}=h<Y
import org.rut.util.algorithm.support.MergeSort; ut8v&i1?
import org.rut.util.algorithm.support.QuickSort; ;&B;RUUnTO
import org.rut.util.algorithm.support.SelectionSort; Cf@~W)K
import org.rut.util.algorithm.support.ShellSort; Le#>uWM
eZes) &4
/** m$^Wyk}
* @author treeroot ?wzE+p-
* @since 2006-2-2 ~,[<R
* @version 1.0 ``*iK
*/ S<do.{|p[
public class SortUtil { l-` M 9#
public final static int INSERT = 1; 'Rbv3U
public final static int BUBBLE = 2; +&?#Gdb
public final static int SELECTION = 3; ?.1yNO*s
public final static int SHELL = 4; #-S%aeB
public final static int QUICK = 5; ph*?y
public final static int IMPROVED_QUICK = 6; JJ\|FZN
public final static int MERGE = 7; eUMOV]h
public final static int IMPROVED_MERGE = 8; -4du`dg
public final static int HEAP = 9; \;&WF1d`ac
pVgzUu7
public static void sort(int[] data) { ;a@%FWc
sort(data, IMPROVED_QUICK); d/I,`
} aLZza"W
private static String[] name={ uE{r09^q\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mx`QBJ
}; $ ?ayE
OW}ny
private static Sort[] impl=new Sort[]{ >bQ'*!
new InsertSort(), a,<l_#'
new BubbleSort(), J1P jMb}
new SelectionSort(), /)6+I(H
new ShellSort(), z%ZAN-
new QuickSort(), NDsF<2A4
new ImprovedQuickSort(), X2CpA;#;7l
new MergeSort(), ~mAv)JK
new ImprovedMergeSort(), vjNP
new HeapSort() jz CA2N%
}; 4%k{vo5i
{D6lSj
public static String toString(int algorithm){ )"W__U0
return name[algorithm-1]; fpd4 v|(
} a=m4)tjk
?T.' q
public static void sort(int[] data, int algorithm) { %x(||cq
impl[algorithm-1].sort(data); Tj0qq.
} u!$+1fI>
0?@;zTE0
public static interface Sort { bH6i1c8
public void sort(int[] data); 4KSZ;fV6/
} &lnr?y^
ck0K^o v
public static void swap(int[] data, int i, int j) { FU]jI[
int temp = data; p./9^S
data = data[j]; ngmHiI W
data[j] = temp; V)|]w[(Y
} HLYog+?
} .7GTL