[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; js;k,`
} N<~LgH
int i1=l; 6%Pvh- ~_
int i2=mid+1; U8OVn(qV
for(int cur=l;cur<=r;cur++){ )nlFyWXh.
if(i1==mid+1) -unQ4G
data[cur]=temp[i2++]; O`Y@U?^N
else if(i2>r) 2$b JMx>
data[cur]=temp[i1++]; d+p^fBz
else if(temp[i1] data[cur]=temp[i1++]; KEjMxOv1
else c)Ne/E{!0
data[cur]=temp[i2++]; :Z.P0=
} HdRwDW@7=
} }8[
cq~~a(IS
} ;sAe#b
YBL.R;^v
改进后的归并排序: 9L>73P{_
NAX`y2z
package org.rut.util.algorithm.support; S2 MJb
@$1jp4c
import org.rut.util.algorithm.SortUtil; "a-;?S&
K!(hj '0.
/** C8%MKNPd
* @author treeroot eq@-J+
* @since 2006-2-2 lE$(*1H
* @version 1.0 0:$pJtx"
*/ R-tZC9 @
public class ImprovedMergeSort implements SortUtil.Sort { ee{K5G
gOr%N!5
private static final int THRESHOLD = 10; "gt1pf~y
0|ekwTx.
/* %$N,6}n
* (non-Javadoc) 5p ,HkV
* v>s,*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,z#S=I
*/ h:i FLSf
public void sort(int[] data) { K/_"ybR7
int[] temp=new int[data.length]; +&G]\WX<
mergeSort(data,temp,0,data.length-1); LTuT"}dT[
} %<`sDO6Q?
tAkv'.
private void mergeSort(int[] data, int[] temp, int l, int r) { a%/D~5Z
int i, j, k; n<1*cL:8B
int mid = (l + r) / 2; Hc-up.?v'v
if (l == r) |uI~}pSG
return; @|{8/sOq
if ((mid - l) >= THRESHOLD) \Nk578+AA
mergeSort(data, temp, l, mid); jhJ<JDJ?`
else .>S1do+
insertSort(data, l, mid - l + 1); DB}v..
if ((r - mid) > THRESHOLD) dptfIBYc+
mergeSort(data, temp, mid + 1, r); |.;]e[&
else RKp9[^/?
insertSort(data, mid + 1, r - mid); *S?'[PS]1
E{}J-_oS45
for (i = l; i <= mid; i++) { *P|~vCnr
temp = data; (}s& 84!
} cj[x%eK>
for (j = 1; j <= r - mid; j++) { egH,7f(yP
temp[r - j + 1] = data[j + mid]; 4q.yp0E
} ^Vf@J
int a = temp[l]; Yhjv[9
int b = temp[r]; 0O>M/ *W
for (i = l, j = r, k = l; k <= r; k++) { CR;E*I${
if (a < b) { EMpq+LrN
data[k] = temp[i++]; !tb!%8{~
a = temp; @|s$:;(=
} else { ))<vCfuz2
data[k] = temp[j--]; hj{)6dBX%
b = temp[j]; %V#MUi1
} XN{WxcZ
} 7]ySj<1
} R~eLEjezm
PF#<CF$=
/** Ikw.L
* @param data ia-ht>F*;
* @param l 7{7Y[F0
* @param i 8(\J~I[^
*/ [Jj@A(Cz
private void insertSort(int[] data, int start, int len) { |'I>Ojm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KP 6vb@(6
} q8n@fi6
} !\'H{,G
} Ni|MTE]~
} Y[_|sIy*
m*YfbOhs#
堆排序： ;$e)r3r`LV
kR:kn:
package org.rut.util.algorithm.support; 1Kr$JIcd
wmIe x
import org.rut.util.algorithm.SortUtil; a)c;z@r
Ab>Kfr#
/** G e5Yz.Qv
* @author treeroot cd=|P?Bi
* @since 2006-2-2 cB36w$n8
* @version 1.0 )=`DEbT
*/ U@CAQ?
public class HeapSort implements SortUtil.Sort{ '[HQ}Wvn
}q'IY:r
/* (non-Javadoc) #I*{_|}=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bsr]Z&9rrk
*/ ;#S]mso1
public void sort(int[] data) { nC!]@lA
MaxHeap h=new MaxHeap(); ZJc{P5a1J
h.init(data); *po o.Zz
for(int i=0;i h.remove(); !]Qk?T~9-
System.arraycopy(h.queue,1,data,0,data.length); t&F:C
} f F)M'C
*9xxX,QT8Q
private static class MaxHeap{ 5f?GSHA}
d*VvQU8C
void init(int[] data){ j@^zK!mO
this.queue=new int[data.length+1]; XjP&
for(int i=0;i queue[++size]=data; VzIZT{
fixUp(size); !8T04988j
} f~PS'I_r
} NZ&ZK@h}.
QBH|pr
private int size=0; 'DNxc
{dh,sbl
private int[] queue; tm1&OY
}{j@q~w>$
public int get() { I)vR
return queue[1]; {.p;V
} l&qyLL2 w
ujkWVE'
public void remove() { @: =vK?8L
SortUtil.swap(queue,1,size--); 8~t8^eBg
fixDown(1); doe3V-if
} `OgT"FdL!
file://fixdown <#57q%
private void fixDown(int k) { X%znNx
int j; 4lpcJ+:o
while ((j = k << 1) <= size) { AXte&l=M
if (j < size %26amp;%26amp; queue[j] j++; BqHqS
if (queue[k]>queue[j]) file://不用交换 | 4}Y:d
break; %4F\#" A
SortUtil.swap(queue,j,k); \`["IkSg7
k = j; X>Q44FV!
} K(PSGlI f
} ]!P8{xmb@
private void fixUp(int k) { On~KTt3Mp
while (k > 1) { WcS`T?Xa
int j = k >> 1; )8rF'pxI
if (queue[j]>queue[k]) %72(gR2Wa2
break; 8>LDo"<
SortUtil.swap(queue,j,k); ~x/ka43
k = j; .w@B )f*
} 8#tuB8>
} _yR_u+5
oqysfLJ
} r-xP6
@x}^2FE
} nw+^@|4
febn?|@
SortUtil： Sy1O;RTn`
<-b9 )>
package org.rut.util.algorithm; &0y`Gt
[q3zs_nz
import org.rut.util.algorithm.support.BubbleSort; ezY^T
import org.rut.util.algorithm.support.HeapSort; |4 \2,M#
import org.rut.util.algorithm.support.ImprovedMergeSort; |ka/5o
import org.rut.util.algorithm.support.ImprovedQuickSort; @R%qP>_
import org.rut.util.algorithm.support.InsertSort; |39,n~"o&
import org.rut.util.algorithm.support.MergeSort; 8q{|nH
import org.rut.util.algorithm.support.QuickSort; {~FPvmj&
import org.rut.util.algorithm.support.SelectionSort; GiM-8y~
import org.rut.util.algorithm.support.ShellSort; 5Rs#{9YE
+^esL9RG:
/** Ri_2@U-
* @author treeroot ru9@|FgAE
* @since 2006-2-2 ZYY2pY 1
* @version 1.0 G rU`;M"
*/ Q4LPi;{\
public class SortUtil { cAwqIihZ
public final static int INSERT = 1; eIF6f& F
public final static int BUBBLE = 2; [?9 `x-Q
public final static int SELECTION = 3; :2==7u7v?
public final static int SHELL = 4; ]>Z9K@
public final static int QUICK = 5; hF@%k ;I
public final static int IMPROVED_QUICK = 6; g~.#.S ds
public final static int MERGE = 7; r5nHYV&7
public final static int IMPROVED_MERGE = 8; BgT ^
public final static int HEAP = 9; ;UpJ_y)n8\
GwP!:p|
public static void sort(int[] data) { '/03m\7
sort(data, IMPROVED_QUICK); 1|xe'w{
} D^m2iW;
private static String[] name={ 0?/gEr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^zO{Aks
}; Cx/J_Ro#
R?:Q=7K
private static Sort[] impl=new Sort[]{ ~D|,$E tX4
new InsertSort(), V~/-e- 9u
new BubbleSort(), ,C><n kx
new SelectionSort(), _L~ 3h
new ShellSort(), x=7:D
new QuickSort(), u=v-,Tw
new ImprovedQuickSort(), >FOCdlJ#
new MergeSort(), g&F$hm
new ImprovedMergeSort(), nM.g8d K
new HeapSort() [Z:P{yr
}; inO;Uwlv
l P=I0A-
public static String toString(int algorithm){ YQHpW>z
return name[algorithm-1]; ?uL-qsU
} =6:9y}~
579D
public static void sort(int[] data, int algorithm) { LkzA_|8:D
impl[algorithm-1].sort(data); XK/l1E3N
} fUWrR1
%Y;^$%X%_
public static interface Sort { Yu)GV7\2
public void sort(int[] data); SS`\_@ci
} ^1Fzs(#.
p\;8?x
public static void swap(int[] data, int i, int j) { Ekq(
int temp = data; b,+KXx
data = data[j]; #>:S&R?2t
data[j] = temp; (Ytr&gh;0
} m`8{arz2
} c\rP -"C