[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; +|YZEC
} HbfB[%
int i1=l; a BH1J]_
int i2=mid+1; S{T d/1}
for(int cur=l;cur<=r;cur++){ g+)\/n|
if(i1==mid+1) yKEFne8^
data[cur]=temp[i2++]; ,D2_Z]
else if(i2>r) hyfnIb@~}
data[cur]=temp[i1++]; PZRn6Tc
else if(temp[i1] data[cur]=temp[i1++]; .{a2z*o
else *;E+9^:V
data[cur]=temp[i2++]; \N , '+
} 8Vhck-wF
} }k0-?_Z=1
+JS/Z5dl+}
} >TnQ4^;v.
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改进后的归并排序: 0DVZRB
&Z!K]OSY
package org.rut.util.algorithm.support; cievC,3*
CN~NyJL H
import org.rut.util.algorithm.SortUtil; PFy;qk
e)dWa'2<
/** D8AIVK]
* @author treeroot tlLn
* @since 2006-2-2 )z235}P
* @version 1.0 *3`oU\r
*/ DE\bYxJ
public class ImprovedMergeSort implements SortUtil.Sort { bTQa'y`3
g+ 1=5g
private static final int THRESHOLD = 10; /:{_|P\
D>b5Uwt
/* <-B"|u
* (non-Javadoc) 'Rd*X6dv
* @@3,+7%1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <!}l~Ln15
*/ a<wQzgxG
public void sort(int[] data) { FEZ"\|I|
int[] temp=new int[data.length]; 5YI/Ec
mergeSort(data,temp,0,data.length-1); F0'A/T'ht
} :@%-f:iDj
Z<|_+7T
private void mergeSort(int[] data, int[] temp, int l, int r) { Iei7!KLW
int i, j, k; wEnuUC4j
int mid = (l + r) / 2; {_XrZ(y/
if (l == r) o;4e)tK
return; BT#=Xh
if ((mid - l) >= THRESHOLD) k3>ur>aW
mergeSort(data, temp, l, mid); $W {yK+N
else UcLNMn|
insertSort(data, l, mid - l + 1); VMZ]n%XRXW
if ((r - mid) > THRESHOLD) ]ZKt1@4AY
mergeSort(data, temp, mid + 1, r); o47 f
else g2{H^YUN$_
insertSort(data, mid + 1, r - mid); }{wTlR.]
p=_XMh`;
for (i = l; i <= mid; i++) { Vx6?@R
temp = data; fHe0W
} yOUX E>-
for (j = 1; j <= r - mid; j++) { (ND5CKCR^
temp[r - j + 1] = data[j + mid]; r3H}*Wpf
} ^/C$L8#
int a = temp[l]; k'ZUBTRq!
int b = temp[r]; Go\} A:|s
for (i = l, j = r, k = l; k <= r; k++) { Z#F,y)YiO
if (a < b) { of'ZNQ/
data[k] = temp[i++]; !q$&JZY
a = temp; jxnQG A
} else { En,)}yI
data[k] = temp[j--]; ^\[LrPqe
b = temp[j]; }xf='lE
} nRXSW&V"m
} kUg+I_j6*
} UGmuX:@y76
?VZ11?u
/** k)5_1y
* @param data @UpC{M--Wr
* @param l h-La'}>?
* @param i O[(?.9
*/ vNz;#Je
private void insertSort(int[] data, int start, int len) { ,zN3? /7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OJ35En
} d2A wvP
} ^5;vx
} )ew[ Ak|
} HCJ8@nki
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堆排序： v;fJM5PA
s~Lfi.
package org.rut.util.algorithm.support; :J Gl>V
-OrY{^F
import org.rut.util.algorithm.SortUtil; 0\cnc^Z
1c)\
/** %Ui{=920
* @author treeroot %wt2F-u
* @since 2006-2-2 i5 L:L
* @version 1.0 Hz]4AS
*/ !f\?c7
public class HeapSort implements SortUtil.Sort{ Gpdv]SON{
dNUR)X#e
/* (non-Javadoc) vXyuEEe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &\1'1`N1
*/ \-Iny=$
public void sort(int[] data) { 0~+NB-L}
MaxHeap h=new MaxHeap(); ~*7O(8
h.init(data); Jt2,LL:G
for(int i=0;i h.remove(); /lLov.
System.arraycopy(h.queue,1,data,0,data.length); Vl{~@G,@
} t{R5 EU
c$Xe.:QY
private static class MaxHeap{ "[jhaUAK
6_R\l@a
void init(int[] data){ _/,SZ-C#L4
this.queue=new int[data.length+1]; v)@,:u)
for(int i=0;i queue[++size]=data; oe(9mYWKa6
fixUp(size); t1e4H=d>
} 01LZE,.
} %bIsrQ~B
/~i.\^HX
private int size=0; Gr5`1`8|
ZjU=~)O}H
private int[] queue; GA|/7[I}
JsmbW|t^
public int get() { ^uyNv-'F
return queue[1]; bKk CW
} [1z{T(dh
brg":V1a
public void remove() { j|VXC(6P,
SortUtil.swap(queue,1,size--); klgv{_b
fixDown(1); n$.1Wk"
} g!1I21M1~
file://fixdown \f(Y:}9
private void fixDown(int k) { C(-[ Y!
int j; aGPqh,<QD
while ((j = k << 1) <= size) { Q0V^PDF
if (j < size %26amp;%26amp; queue[j] j++; YF}9k
if (queue[k]>queue[j]) file://不用交换 8#+`9GI
break; )K{o<m~WAo
SortUtil.swap(queue,j,k); ;#3ekl{-g
k = j; \s=QiPK
} Bu7A{DRf
} X_D6eYF
private void fixUp(int k) { >9-Dd)<
while (k > 1) { 0jBKCu
int j = k >> 1; MWBXs75I
if (queue[j]>queue[k]) W`#gpi)7N
break; RK?jtb=&A
SortUtil.swap(queue,j,k); xN6?yr
k = j; It%T7 X#
} o;3j:#3 |
} -NAmu97V}
" Wp
} <O;&qT*b
}dy9IH
} A?e,U,
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SortUtil： A&N$tH
!q!"UMiG
package org.rut.util.algorithm; csYy7uzi
r+o_t2_b*
import org.rut.util.algorithm.support.BubbleSort; X*0k>j
import org.rut.util.algorithm.support.HeapSort; ytEQ`
import org.rut.util.algorithm.support.ImprovedMergeSort; Iq+2mQi*/k
import org.rut.util.algorithm.support.ImprovedQuickSort; I?^aCnU
import org.rut.util.algorithm.support.InsertSort; &a.']!$^"
import org.rut.util.algorithm.support.MergeSort; M9gOoYf,~
import org.rut.util.algorithm.support.QuickSort; +<&E3Or
import org.rut.util.algorithm.support.SelectionSort; nt7|f,_J
import org.rut.util.algorithm.support.ShellSort; ;:P7}v fz!
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/** bn$)f6%
* @author treeroot ,ohmc\*J
* @since 2006-2-2 ^D>fis
* @version 1.0 ]*0(-@
*/ 19'5Re&
public class SortUtil { +6 ho)YL
public final static int INSERT = 1; U<Vy>gIC
public final static int BUBBLE = 2; X1Qr_o-BR
public final static int SELECTION = 3; ThtMRB)9
public final static int SHELL = 4; mIvnz{_d
public final static int QUICK = 5; mxgqS=`
public final static int IMPROVED_QUICK = 6; jDkm:X}:
public final static int MERGE = 7; {t&*>ma6)
public final static int IMPROVED_MERGE = 8; +@e }mL\8
public final static int HEAP = 9; 012Lwd
6;gLwOeOHY
public static void sort(int[] data) { 1t.R+1[c
sort(data, IMPROVED_QUICK); sa G8g
} x.ba|:5
private static String[] name={ &I%IaNco
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^;+[8:Kb
}; K!p,x;YX
R }1W
private static Sort[] impl=new Sort[]{ .@@an;C
new InsertSort(), $%Z3;:<Uf-
new BubbleSort(), / $_M@>
new SelectionSort(), tj[c#@[B
new ShellSort(), }w#F6
new QuickSort(), K U$`!h
new ImprovedQuickSort(), /HZv
new MergeSort(), RpYcD
new ImprovedMergeSort(), T<P0T<
new HeapSort() ]w!0u2K<Q\
}; wqP2Gw7jh6
>VP5vkv=
public static String toString(int algorithm){ b:1 L@8s;
return name[algorithm-1]; /[%w*v*'
} aZ6'|S;
<6/= y1QC)
public static void sort(int[] data, int algorithm) { 0'`S,
impl[algorithm-1].sort(data); 6lsEGe
} `"c'z;
`;$h'eI9
public static interface Sort { ->h5T%sn
public void sort(int[] data); h,t:]
} QXs8:;T
q6REh;$
public static void swap(int[] data, int i, int j) { CcY7$D
int temp = data; NO2(vE
data = data[j]; Vc _:*
data[j] = temp; 6Cv.5Vhx
} IB8gDP2
} gqfDacDJL