[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; 6iFd[<.*j
} ^tuJM:
int i1=l; ANCgch\
int i2=mid+1; %;zWS/JhL
for(int cur=l;cur<=r;cur++){ 7q|(ZZa
if(i1==mid+1) DZXv3gnX
data[cur]=temp[i2++]; nu$LWC-
else if(i2>r) |"P5%k#6^>
data[cur]=temp[i1++]; P N_QK Z
else if(temp[i1] data[cur]=temp[i1++]; &K^h'>t'
else o\Hg2^YY>
data[cur]=temp[i2++]; T"Q4vk,3*J
} j<+iL]b
} .@APxeU
"MXd!
} ;8g#"p*&
Vb 4Qt#o
改进后的归并排序: ~pj9_I
&/\0_CoTR\
package org.rut.util.algorithm.support; (U`7[F
X5U!25d]
import org.rut.util.algorithm.SortUtil; M14_w,
nL+*Ja
/** }M|
* @author treeroot (7ew&u\Li
* @since 2006-2-2 eOn,`B1
* @version 1.0 f8?K_K;\
*/ <$D)uY K
public class ImprovedMergeSort implements SortUtil.Sort { z<<` 1wqg
3Uag[ms
private static final int THRESHOLD = 10; BJj~fNm1Zr
3 XfXMVm
/* }C#YR(]
* (non-Javadoc) mk4%]t"
* jd2Fh):q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m2|0<P@k!
*/ jgbw'BBu
public void sort(int[] data) { JpDYB
int[] temp=new int[data.length]; u>S&?X'a
mergeSort(data,temp,0,data.length-1); ]NAPvw#p
} GN1cnM>`
\k1Wh-3
private void mergeSort(int[] data, int[] temp, int l, int r) { &7DE$ S
int i, j, k; ;5Sr<W\:;
int mid = (l + r) / 2; 5Ij_$a
if (l == r) *=/XlSWF
return; 7FDraEr#f
if ((mid - l) >= THRESHOLD) T>uLqd{hH
mergeSort(data, temp, l, mid); F'j:\F6C;
else )edM@beY_
insertSort(data, l, mid - l + 1); }(tGjx]
if ((r - mid) > THRESHOLD) yJp&A
mergeSort(data, temp, mid + 1, r); W: ?-d{
else WejY b;KS
insertSort(data, mid + 1, r - mid); W&!Yprr
2qr%xK'^B
for (i = l; i <= mid; i++) { N'`*#UI+
temp = data; n1ED _9
} QHs]~Ja
for (j = 1; j <= r - mid; j++) { 5h> gz
temp[r - j + 1] = data[j + mid]; %?wuKZLnc
} ufR |
int a = temp[l]; `P z !H
int b = temp[r]; Y*}Sq|y
for (i = l, j = r, k = l; k <= r; k++) { H1?1mH
if (a < b) { C6P6hJm
data[k] = temp[i++]; [U jbox
a = temp; |\_O8=B%
} else { 7>ODaj
data[k] = temp[j--]; ;c>Yr?^
b = temp[j]; kcYR:;y
} nlY ^
} THua?,oyW
} 7k$8i9#
}dXL= ul
/** z{n=G
* @param data r\NnWS J
* @param l J5o"JRJ"
* @param i So8P8TCK
*/ UJm`GO
private void insertSort(int[] data, int start, int len) { ]DUH_<3"E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); []2GN{m
} O.$<Bf9
} nu3 A'E`'k
} Z?x]HB`r
} {[9^@k
WWO jyj
堆排序： TRq~n7Y7C
p5H Mg\hT
package org.rut.util.algorithm.support; Ci*5E$+\
Yj"UD:p
import org.rut.util.algorithm.SortUtil; 0?:ZERv
]t=>#
/** u3ZG;ykM
* @author treeroot xxiLi46/
* @since 2006-2-2 'RA[_Z
* @version 1.0 e!-'O0-Kw
*/ HIU@m<
public class HeapSort implements SortUtil.Sort{ |-|BM'Y
A|&EI-In
/* (non-Javadoc) VC+\RB#:-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;|^fAc~9{r
*/ *@ o3{0[Z
public void sort(int[] data) { @1+/r?b
MaxHeap h=new MaxHeap(); WIGb7}egR
h.init(data); ?SAi tQ3
for(int i=0;i h.remove(); fBF}-{VX(
System.arraycopy(h.queue,1,data,0,data.length); vK{K#{
} "_l[4o[D
0PfFli`2;
private static class MaxHeap{ @<PL
4Oy c D
void init(int[] data){ _YJwF1e+M
this.queue=new int[data.length+1]; NWpRzh8$u
for(int i=0;i queue[++size]=data; j>T''Tf
fixUp(size); i!HGM=f
} Lf-8G5G
} #SXXYh-e
B%pvk.`
private int size=0; xn@jL;+<-
Qh[t##I/
private int[] queue; H xlw1(zS
`WB|h)Y
public int get() { l>iU Q&V
return queue[1]; @bx2=
} m\>x_:sE
4[ra
public void remove() { S'O0'5U@
SortUtil.swap(queue,1,size--); JU@$(
fixDown(1); + ND9###
} .3&m:P8zV
file://fixdown ;H=6u
private void fixDown(int k) { 2ya`2 m
int j; *O5+?J Z!
while ((j = k << 1) <= size) { 'KL(A-}!
if (j < size %26amp;%26amp; queue[j] j++; \\qg2yI
if (queue[k]>queue[j]) file://不用交换 ?*@h]4+k'
break; dF,FH-
SortUtil.swap(queue,j,k); 5^dw!^d
k = j; `R> O5Rv
} t5k&xV=~ #
} )yP>}ME
private void fixUp(int k) { o7+/v70D
while (k > 1) { _~kcr5
int j = k >> 1; i/~J0qQ
if (queue[j]>queue[k]) kUt9'|9!
break; 8zCAy@u
SortUtil.swap(queue,j,k); 3KKe4{oG
k = j; T42g4j/l~
} LTe7f8A
} w(j9[
=I(s7=Liu
} hvyN8We
6&Dvp1`m
} z!+<m<
q T].,?
SortUtil： `9+EhP$RS
3EvA 5K.
package org.rut.util.algorithm; #+;=ijyF
taQ[>x7b
import org.rut.util.algorithm.support.BubbleSort; T_uuFL
import org.rut.util.algorithm.support.HeapSort; O5Lv:qAa
import org.rut.util.algorithm.support.ImprovedMergeSort; ;]Aa
import org.rut.util.algorithm.support.ImprovedQuickSort; YiTp-@$}
import org.rut.util.algorithm.support.InsertSort; t}7wRTG
import org.rut.util.algorithm.support.MergeSort; m}9V@@
import org.rut.util.algorithm.support.QuickSort; ~^S-
import org.rut.util.algorithm.support.SelectionSort; |DW'RopM
import org.rut.util.algorithm.support.ShellSort; ]SL&x:/-
76b7-Nj"
/** 1Tq$E[
* @author treeroot &EPEpN R
* @since 2006-2-2 v~\45eEA
* @version 1.0 ([Aq
*/ qt(:bEr^6b
public class SortUtil { 8ilbX)O
public final static int INSERT = 1; IdxToMr
public final static int BUBBLE = 2; 4AYc8Z#'
public final static int SELECTION = 3; 9pcf jx..
public final static int SHELL = 4; d_+8=nh3
public final static int QUICK = 5; %SGO"*_
public final static int IMPROVED_QUICK = 6; M9#QS`G
public final static int MERGE = 7; p|d9g ^
public final static int IMPROVED_MERGE = 8; =!^iiHF
public final static int HEAP = 9; `5Btg. &
hD1AK+y
public static void sort(int[] data) { Wts{tb
sort(data, IMPROVED_QUICK); `4bd,
} (NdgF+'=
private static String[] name={ !yX<v%>_0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >U<nEnB$?
}; j>xVy]v=|
fWyDWU
private static Sort[] impl=new Sort[]{ w<Cmzkf
new InsertSort(), \&5@yh
new BubbleSort(), LG#w/).^
new SelectionSort(), dV{Hn {(
new ShellSort(), DA$Q-
new QuickSort(), ^Nw]'e3
new ImprovedQuickSort(), rfRo*u2"
new MergeSort(), N[bN"'U/1
new ImprovedMergeSort(), eC?/l*gF3
new HeapSort() rR@n> Xx
}; J&:W4\ m
$ bNe0
public static String toString(int algorithm){ Hi_Al,j:
return name[algorithm-1]; RYl3txw
} _[i=TqVmf
!rg0U<bO!
public static void sort(int[] data, int algorithm) { `^L<db^A
impl[algorithm-1].sort(data); xm|4\H&Bg
} yH%+cmp7
lE)rRG+JLW
public static interface Sort { ]HV~xD7\
public void sort(int[] data); eCIRt/ uA
} I`W-RWZ
g[au-.:
public static void swap(int[] data, int i, int j) { >J3ja>Gw/
int temp = data; =9 M|o0aY
data = data[j]; +?Jk@lE<
data[j] = temp; =jIT"rk
} V`,[=u?c
} n>:c}QAJH