[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; qe@ctHpn
} V]fsjpvlmr
int i1=l; jeLC)lQ*
int i2=mid+1; {YT@$K]w,
for(int cur=l;cur<=r;cur++){ "6} #65
if(i1==mid+1) +kdZfv>
data[cur]=temp[i2++]; mY& HK)
else if(i2>r) TQjM3Ri=V
data[cur]=temp[i1++]; fdCN?p[_
else if(temp[i1] data[cur]=temp[i1++]; S@WzvM
else x_eR/B>
data[cur]=temp[i2++]; '_`O&rbT
} &|j^?ro6
} tXu_o6]
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} Pd^v-}[
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改进后的归并排序: B?|url6h
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package org.rut.util.algorithm.support; {rE]y C^
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import org.rut.util.algorithm.SortUtil; G|,'6|$jE
E#I^D/0
/** <lxE^M
* @author treeroot dh.vZ0v=7
* @since 2006-2-2 ~UhTy~jya
* @version 1.0 no`>r}C
*/ }@'Zt6+tS
public class ImprovedMergeSort implements SortUtil.Sort { zK@DQ5
q,->E<8
private static final int THRESHOLD = 10; 9bVPMq7}i
U$+G9
/* rERHfr`OU
* (non-Javadoc) ySXQn#}-,
* !U?Z<zh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OY?x'h
*/ Bl6>y/
public void sort(int[] data) { k#Bq8d
int[] temp=new int[data.length]; N-Jp; D
mergeSort(data,temp,0,data.length-1); teDO,$
} {WYHT6Z
{YoK63b$
private void mergeSort(int[] data, int[] temp, int l, int r) { q=+AN</
int i, j, k; \as^z!<
int mid = (l + r) / 2; 'GJ'Vli
if (l == r) p~!UE/V
return; fSL'+l3
if ((mid - l) >= THRESHOLD) 7yDWcm_y
mergeSort(data, temp, l, mid); 8F#z)>q~
else /GQN34RD
insertSort(data, l, mid - l + 1); JXa5snh{h
if ((r - mid) > THRESHOLD) LaolAqU
mergeSort(data, temp, mid + 1, r); 61"w>;d6
else #;WKuRv
insertSort(data, mid + 1, r - mid); U<"@@``+N
+LEU|#
for (i = l; i <= mid; i++) { @|hn@!YK
temp = data; f(r=S Xa*
} )t#v55M
for (j = 1; j <= r - mid; j++) { ;xKPa6`E
temp[r - j + 1] = data[j + mid]; WU" Lu
} ha -KfkPFE
int a = temp[l]; btZ9JZvMx
int b = temp[r]; )rce%j7
for (i = l, j = r, k = l; k <= r; k++) { ztRe\(9bL
if (a < b) { ),u)#`.l G
data[k] = temp[i++]; (aQNe{D#
a = temp; },W<1*|
} else { <RFT W}f!
data[k] = temp[j--]; zZ11J0UI
b = temp[j]; ^zs]cFN#%
} `Zm-F
} F CbU> 1R
} dQkp &.
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/** 2xx
* @param data c<c"n'
* @param l HT: p'Yyi
* @param i \F }s"#
*/ + yF._Ie=
private void insertSort(int[] data, int start, int len) { 'q:t48&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ff3HR+%M
} u#c3T'E
} (> {CwtH][
} MkCq$MA
} z|5Sy.H>
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堆排序： jwe^(U
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package org.rut.util.algorithm.support; k-`5TmW
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import org.rut.util.algorithm.SortUtil; t;?TXAA
f L}3I(VK
/** <:tD m
* @author treeroot e/{1u$
* @since 2006-2-2 ^q$m>|KI
* @version 1.0 :{YOJDtR
*/ <Z -d5D>
public class HeapSort implements SortUtil.Sort{ 1l(_SD;90t
zv%9?:
/* (non-Javadoc) >>nt3q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e7cqm*Qi
*/ _?+gfi+
public void sort(int[] data) { V:wx@9m)
MaxHeap h=new MaxHeap(); Bn5O;I13
h.init(data); Z^ e?V7q
for(int i=0;i h.remove(); %v_w"2x;
System.arraycopy(h.queue,1,data,0,data.length); !&ly :v!
} =DT7]fU
,vnHEY&
private static class MaxHeap{ 4%]wd}'#Un
bc{ {a
void init(int[] data){ mqx#N%
this.queue=new int[data.length+1]; .8O.
for(int i=0;i queue[++size]=data; 0)?.rthk4S
fixUp(size); %e71BZo~^s
} YjT7_|`(]
} j?YZOO>X
z TM1 e
private int size=0; b/I_iJ8t
*s"dCc
private int[] queue; (}|QSf:
,dG2[<?o
public int get() { %O!~!'
return queue[1]; 7E-1 #4
} S\F;b{S1
)G a%Eg9
public void remove() { _Kw<4$0<p
SortUtil.swap(queue,1,size--); B}(+\Q$I
fixDown(1); [YsN c
} me7?
file://fixdown CXZO
private void fixDown(int k) { |?tUUT!`t
int j; 6^Q Bol
while ((j = k << 1) <= size) { ks=l Nz9
if (j < size %26amp;%26amp; queue[j] j++; vuOixAkw
if (queue[k]>queue[j]) file://不用交换 I`~ofq?r
break; rTgCmr'&
SortUtil.swap(queue,j,k); ^D{!!)O
k = j; 3miEF0x[
} )sh+cfTCb
} JIGoF
private void fixUp(int k) { ~Lyy7B9
while (k > 1) { \R6D'Yt
int j = k >> 1; 8w:A""
if (queue[j]>queue[k]) 4^KeA".
break; ^hpdre"
SortUtil.swap(queue,j,k); aQzu[N
k = j; i"#36CVT~
} *gJ:irah
} #-0}r
\KGi54&Y
} sI@y)z
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} A`NkgVq5:
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SortUtil： rfl-(_3
@-7h}2P Q
package org.rut.util.algorithm; f:=y)+@1My
6eUM[C.
import org.rut.util.algorithm.support.BubbleSort; {GTOHJ2
import org.rut.util.algorithm.support.HeapSort; ZW6ZO[`6
import org.rut.util.algorithm.support.ImprovedMergeSort; M_5$y)M
import org.rut.util.algorithm.support.ImprovedQuickSort; #`1@4,iC
import org.rut.util.algorithm.support.InsertSort; sbxOnwP\
import org.rut.util.algorithm.support.MergeSort; tML[~AZh
import org.rut.util.algorithm.support.QuickSort; UX?EOrfJ
import org.rut.util.algorithm.support.SelectionSort; 'T8(md299
import org.rut.util.algorithm.support.ShellSort; D9cpw0{nc
.+;;-]})
/** Y"x9B%e
* @author treeroot gCVgL]jj(
* @since 2006-2-2 y)s+/Teb
* @version 1.0 N,iYUM?
*/ cVx#dDdA
public class SortUtil { pCE,l'Xa
public final static int INSERT = 1; &.> 2@
public final static int BUBBLE = 2; aSKLSl't`
public final static int SELECTION = 3; s$V'|Pt
public final static int SHELL = 4; 8>}k5Qu
public final static int QUICK = 5; 'Mfn:n+
public final static int IMPROVED_QUICK = 6; {hS9FdWA;
public final static int MERGE = 7; -2{NIF^H
public final static int IMPROVED_MERGE = 8; ^1#"FU2cP
public final static int HEAP = 9; hzT,0<nw
1Q&\y)@bT
public static void sort(int[] data) { ku@sQn
sort(data, IMPROVED_QUICK); doIcO,Q
} oj|\NlR
private static String[] name={ .4jU G=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z qM:'x*
}; Au-_6dT
@Kx@ 2#~b
private static Sort[] impl=new Sort[]{ s/;iZiWK
new InsertSort(), 8f\sG:$
new BubbleSort(), +A 4};]W|
new SelectionSort(), @w%{yzr%
new ShellSort(), b,Z\{M:f;F
new QuickSort(), Kzj9!'0R
new ImprovedQuickSort(), lK}W%hzU
new MergeSort(), Z{9 mZlIy
new ImprovedMergeSort(), h!vq~g
new HeapSort() |#y+iXTJ
}; z'FpP
E{Tvjh+
public static String toString(int algorithm){ l7+[Zn/v *
return name[algorithm-1]; nB;yS<
} j4!g&F _y
0[f8Gb3
public static void sort(int[] data, int algorithm) { _a~uIGN
impl[algorithm-1].sort(data); &<oZl.T
} ([mC!d@a
\:'|4D]'I
public static interface Sort { a2'si}'3
public void sort(int[] data); aSN"MTw.
} dx/NY1
yF~iVt
public static void swap(int[] data, int i, int j) { ]TE,N$X
int temp = data; QB/H
data = data[j]; u?ALZxj?
data[j] = temp; q ,C)AZ
} W)RCo}f
} #>]o'KQx