[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; &x3"Rq_
} <r\)hx0ov
int i1=l; siG?Sd_2
int i2=mid+1; , m\0IgZdz
for(int cur=l;cur<=r;cur++){ C )I"yeS.
if(i1==mid+1) CTI(Kh+
data[cur]=temp[i2++]; K8+b\k4E
else if(i2>r) ^y3\e
data[cur]=temp[i1++]; c]"B)I1L
else if(temp[i1] data[cur]=temp[i1++]; xUw\Y(!
else *K98z ?
data[cur]=temp[i2++]; tEEhSG)s%
} KW;xlJz(j
} ~::R+Lh(
fwnpmuJ
} Sx~_p3_5U
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改进后的归并排序: pts}?
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package org.rut.util.algorithm.support; d,[KcX
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import org.rut.util.algorithm.SortUtil; +Va?wAnr
q-o>yjT~
/** w|Mj8Lc+
* @author treeroot e7?W VV,
* @since 2006-2-2 A,og9<+j-
* @version 1.0 "p;DQ-V
*/ .{;!bw
public class ImprovedMergeSort implements SortUtil.Sort { <s2l*mc
=;a4 Dp
private static final int THRESHOLD = 10; V*m)h
TZP{=v<
/* mQvKreo~
* (non-Javadoc) m@Nx`aS?
* N4v)0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |HU qqlf
*/ ]q3Kd{B
public void sort(int[] data) { \|pAn
int[] temp=new int[data.length]; T7T!v
mergeSort(data,temp,0,data.length-1); <F3sQAe
} [!q&r(-K
?% X9XH/!
private void mergeSort(int[] data, int[] temp, int l, int r) { `%XgGHiE
int i, j, k; ^kD?0Fm
int mid = (l + r) / 2; xh6x B|Z
if (l == r) VoyH:
return; M"vcF5q
if ((mid - l) >= THRESHOLD) c6uKKh>
mergeSort(data, temp, l, mid); u7C{>
else 2%qn!+.
insertSort(data, l, mid - l + 1); Wu4Nq+
if ((r - mid) > THRESHOLD) "[?/I3{E
mergeSort(data, temp, mid + 1, r); ?xo,)``
else i]-gO
insertSort(data, mid + 1, r - mid); _]S6>
+{%4&T<nHw
for (i = l; i <= mid; i++) { 55cldo
temp = data; ]6;AK\9TM
} 7, 13g)
for (j = 1; j <= r - mid; j++) { g"&bX4uD)
temp[r - j + 1] = data[j + mid]; ?|7+cz$g
} &v-V_.0(H
int a = temp[l]; Ntnmd
int b = temp[r]; 4QN;o%,
for (i = l, j = r, k = l; k <= r; k++) { b:QFD|
if (a < b) { %1@<),
data[k] = temp[i++]; lp}WBd+
a = temp; ^'fKey`
} else { oGVSy`ku
data[k] = temp[j--]; cORMR!
b = temp[j]; u0Erz0*G4
} xs I/DW
} L_|uB
} 7L+X\oaB
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/** w&"w"
* @param data =.X?LWKY
* @param l B#?2,
* @param i n2{{S(N
*/ @."o:K
private void insertSort(int[] data, int start, int len) { IPVzV\o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |3,V%>z
} |3s&Y`x-D
} k4$q|x7+%
} KY`96~z
} <VU4rk^=
y,&M\3A
堆排序： hcgc =$^
p},Fwbl
package org.rut.util.algorithm.support; .G_3blE;
M#cr*%
import org.rut.util.algorithm.SortUtil; 0Ad~!Y+1
dn\F!
/** 0Mu8ZVI{
* @author treeroot o$ce1LO?|N
* @since 2006-2-2 KF_Wu}q d
* @version 1.0 ^A[`NYK
*/ v7(|K
public class HeapSort implements SortUtil.Sort{ 8}{o2r@
d `kM0C
/* (non-Javadoc) HD)HCDTX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~J-|,ZMd
*/ 5; PXF
public void sort(int[] data) { $XQxWH|
MaxHeap h=new MaxHeap(); |NU0tct^
h.init(data); qysa!B
for(int i=0;i h.remove(); #a |ch6B
System.arraycopy(h.queue,1,data,0,data.length); !e'0jf-~
} &@HNz6KO
B`B%:#
private static class MaxHeap{ %i-lx`U
"q^#39i?
void init(int[] data){ ~'2r&?=\
this.queue=new int[data.length+1]; Px#QZZ
for(int i=0;i queue[++size]=data; [Hj'nA^
fixUp(size); qX+gG",8
} q Iy^N:C2'
} WjrMd#^
%Lp7@
private int size=0; _ML~c&9jv
V<vPFxC
private int[] queue; +F o$o
em1cc,
public int get() { !wd'::C
return queue[1]; %x6Ov\s2
} 6 r.H8
gXu^"
public void remove() { AM[jL'r|
SortUtil.swap(queue,1,size--); %R|"Afa=
fixDown(1); e[QxFg0E
} vV.~76AD5
file://fixdown >4/L-y+
private void fixDown(int k) { :@ E1Pun?
int j; |jk-@ Z*
while ((j = k << 1) <= size) { Dk`4bYK
if (j < size %26amp;%26amp; queue[j] j++; 43>9)t
if (queue[k]>queue[j]) file://不用交换 Pc(n@'m~
break; rMHQzQ0%
SortUtil.swap(queue,j,k); ?7uKP}1|
k = j; Aw4?y[{H
} 1/2V.:bg
} ,|.8nk"
private void fixUp(int k) { xIQ/$[&v
while (k > 1) { MkDK/K$s
int j = k >> 1; ;T.s!B$Uu
if (queue[j]>queue[k]) nU&NopD+*G
break; b6nZ55 h
SortUtil.swap(queue,j,k); $>r>0S#+\&
k = j; S\9t4Ki_'
} 6~ 7 ;o_>
} @fqV0l!GR
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} A~SL5h
2;4]PRD6w
} <!~1{`n%9J
@VC .>
SortUtil： LZr0]g{Pu/
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package org.rut.util.algorithm; 0+}EA[
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import org.rut.util.algorithm.support.BubbleSort; {N!E5*$Tr
import org.rut.util.algorithm.support.HeapSort; x}?DkFuxb
import org.rut.util.algorithm.support.ImprovedMergeSort; dG\U)WA(p
import org.rut.util.algorithm.support.ImprovedQuickSort; Vvm=MBgN
import org.rut.util.algorithm.support.InsertSort; "x(>Sj\%I
import org.rut.util.algorithm.support.MergeSort; !%c{+]g
import org.rut.util.algorithm.support.QuickSort; !/Iq{2LX
import org.rut.util.algorithm.support.SelectionSort; 9- xlvU,o
import org.rut.util.algorithm.support.ShellSort; ?P""KVpo
{f+N]Oo*
/** z\fW )/
* @author treeroot e1 x^PT
* @since 2006-2-2 7/H^<%;y
* @version 1.0 H2qf'
*/ zL:&Q<
public class SortUtil { E X%6''ys
public final static int INSERT = 1; |[S90Gw]
public final static int BUBBLE = 2; (C daE!I4Q
public final static int SELECTION = 3; {=UFk-$=
public final static int SHELL = 4; Deg!<[Nw
public final static int QUICK = 5; 5D,.^a1 A
public final static int IMPROVED_QUICK = 6; -S"5{N73
public final static int MERGE = 7; Rn`ld@=p[
public final static int IMPROVED_MERGE = 8; )~ 0}Et l
public final static int HEAP = 9; V0K16#}1gM
qysTjGwa]
public static void sort(int[] data) { *GQDfs`m
sort(data, IMPROVED_QUICK); :e*DTVv8
} 3&'2aW
private static String[] name={ &&=[Ivv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^Ye\u1n4
}; GCDwWCxh
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private static Sort[] impl=new Sort[]{ ^ eQFg>
new InsertSort(), '77~{jy
new BubbleSort(), /;?M?o"H
new SelectionSort(), Xka<I3UD5
new ShellSort(), U@G"`RYl
new QuickSort(), 5?WYsj"
new ImprovedQuickSort(), *G9sy_
new MergeSort(), Nln`fE/Ht
new ImprovedMergeSort(), 5W/{h q8}}
new HeapSort() -LtK8wl^
}; m9in1RI%
pkJ/oT
public static String toString(int algorithm){ 57wFf-P
return name[algorithm-1]; .evbE O5
} |EKu2We*
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public static void sort(int[] data, int algorithm) { 0RUi\X4HI
impl[algorithm-1].sort(data); O] Y v
} E<>*(x/\e
A{# Nwd>
public static interface Sort { "(v%1tGk
public void sort(int[] data); iPq &Y*
} hoa7
H&#{l)
public static void swap(int[] data, int i, int j) { ^$v3eKA
int temp = data; rLU'*}
data = data[j]; -KH)J
data[j] = temp; b_TS<,
} 98RKCc9h
} ~@T<gA9V