[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; A-T-4I
} w\o6G7
int i1=l; = IRot
int i2=mid+1; u,So+%
for(int cur=l;cur<=r;cur++){ *VsVCUCz5*
if(i1==mid+1) )|xu5.F
data[cur]=temp[i2++]; 4d5c]%
else if(i2>r) aC\f;&P>
data[cur]=temp[i1++]; ;v@G
else if(temp[i1] data[cur]=temp[i1++]; OW4j!W
else tr[}F7n9
data[cur]=temp[i2++]; X$we\t
} PJC(:R(j
} 7,+eG">0
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} oxlor,lw/
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改进后的归并排序: cZNcplt8
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package org.rut.util.algorithm.support; |6JKB'
6+IhI?lI=
import org.rut.util.algorithm.SortUtil; _w4G|j$C
P);s0Y|@H
/** DJ,LQj
* @author treeroot i *.Y
* @since 2006-2-2 z_$c_J
* @version 1.0 YQG<Q
*/ OX]$Xdb2:
public class ImprovedMergeSort implements SortUtil.Sort { _M%S
FtIcA"^N
private static final int THRESHOLD = 10; U.Mfu9}#:
V2Vr7v=Y"
/* f[k#Znr
* (non-Javadoc) ^[xcfTN
* d^aVP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #y:D{%Wp
*/ +M0pmK!
public void sort(int[] data) { '6dVe2V
int[] temp=new int[data.length]; Snf_{A<
mergeSort(data,temp,0,data.length-1); 1n8[fgz
} e.n(NW
wc;n= %
private void mergeSort(int[] data, int[] temp, int l, int r) { v.-DXQq
int i, j, k; fZo#:"{/K
int mid = (l + r) / 2; )y,^M3$?C
if (l == r) 5)!g.8-!
return; q,,
if ((mid - l) >= THRESHOLD) \0b}Z#'0
mergeSort(data, temp, l, mid); f,cd=vGj
else P }sr
insertSort(data, l, mid - l + 1); *H QcI-
if ((r - mid) > THRESHOLD) u1%URen[x
mergeSort(data, temp, mid + 1, r); ^9[Q;=R
else 13X}pnW
insertSort(data, mid + 1, r - mid); Food<(!.>
Y~I<Locv
for (i = l; i <= mid; i++) { Jbu2y'zE
temp = data; }mj9$=B4
} '>"{yi-
for (j = 1; j <= r - mid; j++) { /sA&}kX}E
temp[r - j + 1] = data[j + mid]; UY< PiP
} SndR:{
int a = temp[l]; )!"fUz$
int b = temp[r]; +-!E%$
for (i = l, j = r, k = l; k <= r; k++) { S\A/*!%~y
if (a < b) { e2O6q05 ?Q
data[k] = temp[i++]; WA`A/`taT
a = temp; :-1|dE)U
} else { j,k3]bP
data[k] = temp[j--]; h !^= c
b = temp[j]; 8q[; 0
} g_Z tDxz
} L.HeBeO
} puC91
;,&cWz
/** 3v8LzS3@
* @param data MET9rT
* @param l YMX9Z||
* @param i e}UQN:1
*/ RuPnWx!
private void insertSort(int[] data, int start, int len) { .Kb3VNgwvm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4VJUu`[
} 3Z b]@n
} dvB=Zk]m
} /|0-O''
} \R#SoOd
)'djqpM.
堆排序： %k!CjW3
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package org.rut.util.algorithm.support; nuce(R
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import org.rut.util.algorithm.SortUtil; mJSfn"b}K
c#n 2!
/** }s~c(sL?;
* @author treeroot Y sM*d
* @since 2006-2-2 OIcXelS:@k
* @version 1.0 `z&#|0O
*/ #a8kA"X
public class HeapSort implements SortUtil.Sort{ .IeO+RDQ
bKQho31a'
/* (non-Javadoc) M-o'`e'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WMB%?30
*/ 2*:q$c
public void sort(int[] data) { aGD< #]
MaxHeap h=new MaxHeap(); s<O$ Y
h.init(data); ~aob@(
for(int i=0;i h.remove(); 8SGaS&
System.arraycopy(h.queue,1,data,0,data.length); 9wvlR6z;u
} QQ(}71U
L+am-k:T~
private static class MaxHeap{ 3Ua?^2l
EW `hL~{
void init(int[] data){ 6Tl6A>%s
this.queue=new int[data.length+1]; GKBoSSnV&
for(int i=0;i queue[++size]=data; A8)4nOXM
fixUp(size); XiW1X6
} Yuvi{ 0
} ]5ZXgz
,d#*i
private int size=0; 8u[_t.y4m
WK{`_c U^
private int[] queue; 9d5$cV
QNNURf\[(
public int get() { EQ1**[$
return queue[1]; p* >z:=
} }3(!kW
)Qbd/zd\U
public void remove() { XqTguO'
SortUtil.swap(queue,1,size--); @oXGa>Ru
fixDown(1); 5ya9VZ5#
} ')m!48
file://fixdown jP+yN|
private void fixDown(int k) { 28MMH Q
int j; &2tfj(ms
while ((j = k << 1) <= size) { TKDG+`TyZ
if (j < size %26amp;%26amp; queue[j] j++; &,nv+>D
if (queue[k]>queue[j]) file://不用交换 1QoW/X'>.
break; \[MAa:/
SortUtil.swap(queue,j,k); I ]m
k = j; S6~y!J6Ok4
} nS+Rbhs
} <:S qMf
private void fixUp(int k) { dOhSqx56
while (k > 1) { +,Eam6g{
int j = k >> 1; ZEqW*piI
if (queue[j]>queue[k]) 'a~@q~!
break; ~ ld.I4
SortUtil.swap(queue,j,k); t>j_C{X1(
k = j; 7({)ou x
} <kn2
} -C=0Pg]ga
`[/#,*\
} <L}@p8Lq
U&^q#['
} )jM%bUk,!
8!_jZf8
SortUtil： gQnr.
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package org.rut.util.algorithm; pKSCC"i&j
u?^V4 +V
import org.rut.util.algorithm.support.BubbleSort; oRV}Nz7hr
import org.rut.util.algorithm.support.HeapSort; ({uW-%
import org.rut.util.algorithm.support.ImprovedMergeSort; ]Ry9{:
import org.rut.util.algorithm.support.ImprovedQuickSort; NRRJlY S
import org.rut.util.algorithm.support.InsertSort; _7c3=f83
import org.rut.util.algorithm.support.MergeSort; '.A!IGsj
import org.rut.util.algorithm.support.QuickSort; 8`4M4"lj
import org.rut.util.algorithm.support.SelectionSort; PxkV[nbS
import org.rut.util.algorithm.support.ShellSort; e(c\U}&
_4S^'FDo
/** "hIYf7r##
* @author treeroot Xoj"rR9|
* @since 2006-2-2 !>`Q]M`
* @version 1.0 mF7Ak&So^
*/ G~9m,l+
public class SortUtil { ]2AOW}=
public final static int INSERT = 1; FYAEM!dyy
public final static int BUBBLE = 2; &^=Lr:I
public final static int SELECTION = 3; s QDgNJbU
public final static int SHELL = 4; T4eJ:u*;
public final static int QUICK = 5; I68u%fCv
public final static int IMPROVED_QUICK = 6; Y{Z&W9U
public final static int MERGE = 7; 8v$q+Wic
public final static int IMPROVED_MERGE = 8; BQu |qrq
public final static int HEAP = 9; o[C^z7WG0
"j>X^vn
public static void sort(int[] data) { {R1]tGOf
sort(data, IMPROVED_QUICK); rOJ>lPs
} Y=S0|!u
private static String[] name={ 5KCQvv\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #xIg(nG
}; yD9enYM
Liqo)m
private static Sort[] impl=new Sort[]{ 3",gjXmBu
new InsertSort(), >* -IIo
new BubbleSort(), 9b. kso9.
new SelectionSort(), c`O~I<(Pm
new ShellSort(), {oQs*`=l>
new QuickSort(), g)hEzL0k
new ImprovedQuickSort(), v\xl?F
new MergeSort(), $>rt0LOF
new ImprovedMergeSort(), mGT('iTM4
new HeapSort() Iiy5;:CX:q
}; 9{Hs1MD[
Yh<F-WOo2
public static String toString(int algorithm){ )nm+_U
return name[algorithm-1]; 4n,&,R r#
} K?.~}82c
&PMQ]B
public static void sort(int[] data, int algorithm) { [gWeD
impl[algorithm-1].sort(data); :jiEn y
} Fis!MMh.$
~ 'ZwD/!e
public static interface Sort { dSDZMB sd
public void sort(int[] data); u8f\)m
} .UK0bxoa
O&Y;/$w
public static void swap(int[] data, int i, int j) { XYcZ;Z9:
int temp = data; [LVXXjkFI
data = data[j]; |$WHw*F^
data[j] = temp; 2?,Jn&i5
} m6Dm1'+
} pqG>|#RG