[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; qyx '
} 1l(_SD;90t
int i1=l; #go!"HL
int i2=mid+1; l\NVnXv:>
for(int cur=l;cur<=r;cur++){ mK>c+ u)
if(i1==mid+1) _?+gfi+
data[cur]=temp[i2++]; 4 )U,A~!
else if(i2>r) ycr\vn t
data[cur]=temp[i1++]; T/$6ov+K
else if(temp[i1] data[cur]=temp[i1++]; 7P!Hryy
else k^vsQ'TD
data[cur]=temp[i2++]; @o g&l;
} IQ`#M~:
} ^-24S#KE
QS*!3?%
} O6[,K1,
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改进后的归并排序: FuKp`T-H
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package org.rut.util.algorithm.support; )U~,q>H+ %
%~`y82r6
import org.rut.util.algorithm.SortUtil; >C1**GQ
(1|_Nr
/** V\ 7O)g
* @author treeroot C]xKdPQj%
* @since 2006-2-2 ZMI!Sl
* @version 1.0 9AxeA2/X
*/ EzXGb
public class ImprovedMergeSort implements SortUtil.Sort { )225ee>
<H,q( :pM
private static final int THRESHOLD = 10; ^zv,VD
Buue][[
/* ];vEj*jCX
* (non-Javadoc) !='?+Ysxs
* S"/M+m+ ]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m-M.F9R
*/ nisW<Q`uB
public void sort(int[] data) { vwlPFrLl
int[] temp=new int[data.length]; dCF!.
mergeSort(data,temp,0,data.length-1); !5/jDvh
} }aPx28:/
y7s:Buyc
private void mergeSort(int[] data, int[] temp, int l, int r) { p7\}X.L
int i, j, k; W6d[v/+K+
int mid = (l + r) / 2; sI7<rI.t){
if (l == r) K)z!e;r
return; BaLvlB
if ((mid - l) >= THRESHOLD) RbY=OOQ
mergeSort(data, temp, l, mid); |@rPd=G^(/
else ep<O?7@j-G
insertSort(data, l, mid - l + 1); ["N)=d|LS
if ((r - mid) > THRESHOLD) vp4l g1/
mergeSort(data, temp, mid + 1, r); EEU)eltI
else EqN_VT@
insertSort(data, mid + 1, r - mid); RP"YSnF3
CPw=?<db
for (i = l; i <= mid; i++) { U|Du9_0
temp = data; tY1M7B^~
} IC1oW)
for (j = 1; j <= r - mid; j++) { zB8 @Wl
temp[r - j + 1] = data[j + mid]; " ^t3VjN
} u+&t"B
int a = temp[l]; -UHa;WH
int b = temp[r]; }i"\?M
for (i = l, j = r, k = l; k <= r; k++) { S#kA$yO
if (a < b) { '`/Qr~]
data[k] = temp[i++]; Y6>@zznk
a = temp; @Qlh
} else { J<<Ph
data[k] = temp[j--]; XtJ_po
b = temp[j]; \fHtk _
} lf<?k
} xXCSaBS~
} :r{;'[38
?l6NQ;z
/** ^9{mjy0Q
* @param data ^F>C|FJ2
* @param l yc#0c[ZQu
* @param i 3rF=u:r7c
*/ ifA)Ppt<`
private void insertSort(int[] data, int start, int len) { 8BL]]gT-I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *gq~~(jH
} Z'vic#
} O>5xFz'm
} QO0#p1fom'
} q&j4PR{
<vMdfw"(
堆排序： 4\cJ}p}LZ{
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package org.rut.util.algorithm.support; Znv3h
xJQ-k/`
import org.rut.util.algorithm.SortUtil; &2~c,] 9C
o@&Hc bN^
/** 5#DtaVz
* @author treeroot b6@(UneVM
* @since 2006-2-2 Zj(2$9IU
* @version 1.0 ~^&]8~m*d
*/ jp~C''Sj
public class HeapSort implements SortUtil.Sort{ #s4v0auK
/$q9 Kxb
/* (non-Javadoc) +@U}gk;#c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rq[+p
*/ n<}t\<LG^c
public void sort(int[] data) { 1Qc>A8SU
MaxHeap h=new MaxHeap(); 2|LgUA?<
h.init(data); Ewfzjc
for(int i=0;i h.remove(); j9V*f HK
System.arraycopy(h.queue,1,data,0,data.length); cgQ4JY/6
} N8]DW_bsB
kM#ZpI&0%
private static class MaxHeap{ `t@Rh~B
7Fg-}lJAC
void init(int[] data){ :o)4Y
this.queue=new int[data.length+1]; l,I[r$TCf
for(int i=0;i queue[++size]=data; 8&g`Uy/b
fixUp(size); lg9`Z>?
} 9S.J%*F7
} 5IwQ<V
WOv m%sX
private int size=0; {^Y0kvnd
*!~jHy8F
private int[] queue; $KmhG1*s
#RJFJb/
public int get() { 4axc05
return queue[1]; ceW,A`J
} U_X/
w7(jSPB
public void remove() { P?.j wI
SortUtil.swap(queue,1,size--); lY.{v]i }
fixDown(1); (jV_L1D
} "JH /ODm
file://fixdown o 0-3[W'x<
private void fixDown(int k) { Cwb}$=p'
int j; )kBN]>&R
while ((j = k << 1) <= size) { {JJq/[j
if (j < size %26amp;%26amp; queue[j] j++; -Um|:[*I
if (queue[k]>queue[j]) file://不用交换 ^lt;K{
break; A6D@#(D
SortUtil.swap(queue,j,k); 4v=NmO}
k = j; `4@_Y<
} lZt{L0
} Y$@?Y/rhR
private void fixUp(int k) { z_A:MoYfo
while (k > 1) { g9rsw7
int j = k >> 1; B{In "R8
if (queue[j]>queue[k]) q=_&izmE'7
break; @CxXkR
SortUtil.swap(queue,j,k); 7%%FYHMO:
k = j; "K!9^!4&
} ZRK1UpP
} Fz3QSr7FU
6v]y\+
} )|Ho"VEmg
5Tb3Yy< .
} 53i7:1[uV
9b8kRz[ c
SortUtil： :~% zX*
}"sZ)FE
package org.rut.util.algorithm; M)<4|x
,{pC1A@s
import org.rut.util.algorithm.support.BubbleSort; "EE=j$8u+
import org.rut.util.algorithm.support.HeapSort; wG,"ZN
import org.rut.util.algorithm.support.ImprovedMergeSort; S~Z`?qHWh
import org.rut.util.algorithm.support.ImprovedQuickSort; pE^jUxk6
import org.rut.util.algorithm.support.InsertSort; ZeL v!
import org.rut.util.algorithm.support.MergeSort; _:ORu Vk
import org.rut.util.algorithm.support.QuickSort; 5UTIGla
import org.rut.util.algorithm.support.SelectionSort; o:.6{+|N
import org.rut.util.algorithm.support.ShellSort; 7[b]%i
f`[gRcZ-
/** KBb{Z;%
* @author treeroot %+1;iuDL
* @since 2006-2-2 _w'N&#
* @version 1.0 09r0Rb
*/ jOE~?{8m
public class SortUtil { `X=2Ff
public final static int INSERT = 1; _LOV&83O(
public final static int BUBBLE = 2; bR0z$~
public final static int SELECTION = 3; R3[H#*gF<
public final static int SHELL = 4; AzfYw'^&9
public final static int QUICK = 5; /IkSgKJiz\
public final static int IMPROVED_QUICK = 6; B <CK~ybY
public final static int MERGE = 7; WX2w7O'R
public final static int IMPROVED_MERGE = 8; J[?7`6\M
public final static int HEAP = 9; ](z?zDk
bSKe@4C
public static void sort(int[] data) { UImd*;2TE
sort(data, IMPROVED_QUICK); HgY#O r(
} h/AL`$
private static String[] name={ 'u%;5;%2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <f')]
}; >o#^)LN
~kkwPs2V
private static Sort[] impl=new Sort[]{ !alO,P%>r
new InsertSort(), 6pKb!JJ
new BubbleSort(), !R`)S7!
new SelectionSort(), '/h~O@Rw
new ShellSort(), S>'S4MJE`
new QuickSort(), _kJ?mTk
new ImprovedQuickSort(), p?#cn
new MergeSort(), fFBD5q(n
new ImprovedMergeSort(), c'678!r9 P
new HeapSort() m V U(b,
}; W8/8V,
S]P80|!|
public static String toString(int algorithm){ 0D\b;ju<
return name[algorithm-1]; =N+Ou5D
} H=f'nm]dQ
Rzolue 8
public static void sort(int[] data, int algorithm) { ,%L>TD'48s
impl[algorithm-1].sort(data); <gdKuoY
} p-6(>,+E[
/{j")
public static interface Sort { oI!L2
public void sort(int[] data); SvE|"
} <0,szw
s[ CnJZ\q
public static void swap(int[] data, int i, int j) { UT^-!L LB]
int temp = data; AIx,c1G]K
data = data[j]; g#=~A&4q
data[j] = temp; 1e0O-aT#Q
} !.[N(%"
} )RQX1("O