[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; 4&+lc*
} GP;UuQz
int i1=l; tA]Y=U+Q
int i2=mid+1; ])iw|`@dJ
for(int cur=l;cur<=r;cur++){ +EE(d/f
if(i1==mid+1) W+D{4:
data[cur]=temp[i2++]; Nvj0MD{ X
else if(i2>r) rX@?~(^ML
data[cur]=temp[i1++]; Spt;m0W90
else if(temp[i1] data[cur]=temp[i1++]; +W[NgUrGJ
else {;E]#=|
data[cur]=temp[i2++]; U.p"JSH L
} wA?q/cw C
} N/i {j.=
NB?y/v
} z{ MO~d9
yjj)+eJ(Q
改进后的归并排序: (H-}z`sy/@
~e#QAaXD#5
package org.rut.util.algorithm.support; Q]<6i
ua]?D2
import org.rut.util.algorithm.SortUtil; ry!0~ir
zaMKwv}BR
/** o%.0@W
* @author treeroot YH/3N(],
* @since 2006-2-2 y(h"0A1lW
* @version 1.0 R"V^%z;8o
*/ APM!xX=N
public class ImprovedMergeSort implements SortUtil.Sort { )2mvW1M=7;
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private static final int THRESHOLD = 10; Yo;Mexo!
Ft^+P*
/* pIP^/H
* (non-Javadoc) N@G~+GCxL
* &JHqUVs^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ypV>*
*/ j2%?-(U
public void sort(int[] data) { Os"T,`F2s
int[] temp=new int[data.length]; !@wG22iC4d
mergeSort(data,temp,0,data.length-1); #xBh62yIuP
} ~;P>}|6Y
QDpzIjJj
private void mergeSort(int[] data, int[] temp, int l, int r) { %% A==_b
int i, j, k; *e}1KcJ
int mid = (l + r) / 2; -G@:uxB
if (l == r) jpRC6b?
return; 6qH^&O][
if ((mid - l) >= THRESHOLD) d gRTV<vM
mergeSort(data, temp, l, mid); o=ULo &9
else P[<EFjE
insertSort(data, l, mid - l + 1); &&K"3"um
if ((r - mid) > THRESHOLD) 5BsfbLKC
mergeSort(data, temp, mid + 1, r); M&~cU{9c
else unN=yeut
insertSort(data, mid + 1, r - mid); FvaelB
yi@mf$A|
for (i = l; i <= mid; i++) { Kb,#Ot
temp = data; G0&'B6I>
} Zq\Vq:MX
for (j = 1; j <= r - mid; j++) { Q3|I.I e
temp[r - j + 1] = data[j + mid]; WSV[)-=:
} `;H3['~$
int a = temp[l]; iyr'9BA
int b = temp[r]; Sxg&73;ZV
for (i = l, j = r, k = l; k <= r; k++) { UVj1nom
if (a < b) { -P[bA0N,
data[k] = temp[i++]; "pW@[2Dkx/
a = temp; TSHH=`cx
} else { Z&Ao;=Gp1
data[k] = temp[j--]; A!.* eIV|
b = temp[j]; xA {1XS}
} )!jX$bK
} 5B,HJax
} [>wvVv
Aa`'g0wmc
/** {u_2L_
* @param data 19#A7
* @param l XbMAcgS
* @param i 8@J5tFJ&%
*/ 5_~QS
private void insertSort(int[] data, int start, int len) { nk^-+olm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bdz&"\$X
} ~u+|NtF
} #uHl
} EaXDY<
} hD!9[Gb
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堆排序： KM jnY2
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package org.rut.util.algorithm.support; ;OD+6@Sr
3&ES?MyB#
import org.rut.util.algorithm.SortUtil; IQA<xqX
Oxq} dX7S
/** Imm|5-qJ
* @author treeroot #RWHk
* @since 2006-2-2 rm nfyn
* @version 1.0 z(dX<
*/ Zk#?.z}
public class HeapSort implements SortUtil.Sort{ g1zX^^nd,V
"}'Sk(
/* (non-Javadoc) Q]NGd 0J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .?CumaU
*/ 2*1FW v
public void sort(int[] data) { D|rcSa.M
MaxHeap h=new MaxHeap(); <"rckPv_H
h.init(data); &6}] v:
for(int i=0;i h.remove(); z~+gche>
System.arraycopy(h.queue,1,data,0,data.length); Qpaan
} E+|r h-M7
` "JslpN
private static class MaxHeap{ V- HO_GDo
[osm\w49
void init(int[] data){ '-k~qQk)6
this.queue=new int[data.length+1]; ?B`Yq\L)
for(int i=0;i queue[++size]=data; *2tG07kI
fixUp(size); Gaxa~?ek
} a{%]X(';
} !ii'hwFm$
oHI/tS4 _
private int size=0; ]psx\ZMa
e:H9!
private int[] queue; SuU %x2
jQ[M4)>_k`
public int get() { +HxL>\
return queue[1]; OlI{VszR
} eg vgi?y
Ul?92
public void remove() { %B{NH~
SortUtil.swap(queue,1,size--); &?@5G
fixDown(1); wBK%=7
} uRu)iBd D
file://fixdown M$Of.
private void fixDown(int k) { )-4xI4
int j; b+`mh
while ((j = k << 1) <= size) { >4lT0~V/
if (j < size %26amp;%26amp; queue[j] j++; _Z|3qQ
if (queue[k]>queue[j]) file://不用交换 rJ UXA<:2
break; ]A2l%V_7
SortUtil.swap(queue,j,k); V*U*_Y
k = j; :*wjC.Z
} _hb@O2f
} ;uazQyo6
private void fixUp(int k) { t%f6P
while (k > 1) { wWNHZv&
int j = k >> 1; |,wp@)e6h
if (queue[j]>queue[k]) vHz]-Q-|9
break; 30Z RKrW"~
SortUtil.swap(queue,j,k); 8Qg,UX
k = j; )|@ H#kv?
} [# '38
} 0u'qu2mV
+Eh^j3W
} [Nn ?:5"
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} VY9|8g/
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SortUtil： Q/,jv5
79svlq=
package org.rut.util.algorithm; Wqu][Wa[Z
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import org.rut.util.algorithm.support.BubbleSort; Aey*n=V4#F
import org.rut.util.algorithm.support.HeapSort; G}&{]w@
import org.rut.util.algorithm.support.ImprovedMergeSort; CK+GD "Z$
import org.rut.util.algorithm.support.ImprovedQuickSort; %EooGHGF?
import org.rut.util.algorithm.support.InsertSort; ~KufSt*
import org.rut.util.algorithm.support.MergeSort; .#] V5g,
import org.rut.util.algorithm.support.QuickSort; R""P01IZH
import org.rut.util.algorithm.support.SelectionSort; oVLgHB\zL
import org.rut.util.algorithm.support.ShellSort; URodvyD
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/** &l=%*`On
* @author treeroot M=hH:[6 &
* @since 2006-2-2 >7VOytc
* @version 1.0 uWYI p\NN
*/ s2{d<0x?v
public class SortUtil { KnC;j-j
public final static int INSERT = 1; aJC,
public final static int BUBBLE = 2; {5=Iu\e
public final static int SELECTION = 3; YYz,sR'%|}
public final static int SHELL = 4; %\ i 7
public final static int QUICK = 5; ZgcJxWC<
public final static int IMPROVED_QUICK = 6; 9$z|kwU
public final static int MERGE = 7; E,[@jxP
public final static int IMPROVED_MERGE = 8; na&?Cw
public final static int HEAP = 9; AAr[xoiYp
3YG[~o|4
public static void sort(int[] data) { k(oHmw
sort(data, IMPROVED_QUICK); !c+Nf2I7S
} Z. ))=w6G
private static String[] name={ VV*Z5U@b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G 1rsd
}; N;9m&)@JR'
#-_';Er\
private static Sort[] impl=new Sort[]{ swBgV,;
new InsertSort(), :3s5{s
new BubbleSort(), cViEvS r
new SelectionSort(), Vs-])Q?7J
new ShellSort(), ]{r*Z6bs
new QuickSort(), =""z!%j
new ImprovedQuickSort(), P9)E1]Dc$
new MergeSort(), Z.b}
new ImprovedMergeSort(), iwnctI
new HeapSort() (6R^/*-o
}; @hlT7C)xK
UN <s1
public static String toString(int algorithm){ =rA"|=
return name[algorithm-1]; |D %m>M6
} +0016UgS#
NW'rqgG
public static void sort(int[] data, int algorithm) { Q2c|sK8
impl[algorithm-1].sort(data); IcM99'P(
} L7*,v5
R^PPgE6!$
public static interface Sort { G[}$s7@k
public void sort(int[] data); +rw?k/
} HJVi:;o
HuPw?8w=
public static void swap(int[] data, int i, int j) { .Vm!Ng )j
int temp = data; "lcNjyU\O
data = data[j]; ZqhCGHy
data[j] = temp; #,0PLU3%
} YRXXutm
} +*2]R~"M