[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; *gRg--PY%
} tpw0j CVu
int i1=l; "4N%I
int i2=mid+1; 7n W*3(
for(int cur=l;cur<=r;cur++){ j.O7-t%C
if(i1==mid+1) '^pA%I2D
data[cur]=temp[i2++]; Wlm%W>%
else if(i2>r) 6FPGQ0q
data[cur]=temp[i1++]; b5u_x_us|
else if(temp[i1] data[cur]=temp[i1++]; HPVW2Y0_N
else z[:UPPbW
data[cur]=temp[i2++]; *xB9~:
} R=ddQ:W6g
} /VB n
Fhw:@@=
} 3\FPW1$i|[
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改进后的归并排序: Qd"{2>
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package org.rut.util.algorithm.support; K%9PIqK?4
\z!*)v/{-
import org.rut.util.algorithm.SortUtil; l/[0N@r~
r2?-QvQ
/** J0xOB;rd
* @author treeroot O[[:3!6q
* @since 2006-2-2 \F=w~ $)
* @version 1.0 >Ya+#j~CZ
*/ JzH\_,,
public class ImprovedMergeSort implements SortUtil.Sort { W,Q"?(+]B
=)5eui>{
private static final int THRESHOLD = 10; VQE8hQ37
.zr2!}lB
/* Kd}cf0
* (non-Javadoc) NikY0=i
* =1g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n,sl|hv2U
*/ m#Rgelhk.
public void sort(int[] data) { >*rsRR
int[] temp=new int[data.length]; -E~pCN(E
mergeSort(data,temp,0,data.length-1); _U)BOE0o
} %.,-dV'
\YO1;\W
private void mergeSort(int[] data, int[] temp, int l, int r) { vwQY_J8
int i, j, k; vtw{ A}
int mid = (l + r) / 2; |GgFdn`>
if (l == r) K FV&Dt}<
return; n1K"VjZk
if ((mid - l) >= THRESHOLD) ,lSt}Lml
mergeSort(data, temp, l, mid); s6SG%Vd
else }R5>ja0
insertSort(data, l, mid - l + 1); $h1`-=\7
if ((r - mid) > THRESHOLD) +r[u4?
mergeSort(data, temp, mid + 1, r); }.O,P'k
else TS+itU62
insertSort(data, mid + 1, r - mid); H%NP4pK
KJc fbZ~
for (i = l; i <= mid; i++) { t4)~A5s
temp = data; o>x*_4[
} >0kn&pe7#T
for (j = 1; j <= r - mid; j++) { ecIxiv\
temp[r - j + 1] = data[j + mid]; )70-q yA
} M@@l>"g@
int a = temp[l]; >mRA|0$
int b = temp[r]; i-Ck:-J
for (i = l, j = r, k = l; k <= r; k++) { <a%9d<@m
if (a < b) { %rVC3}
data[k] = temp[i++]; F VBuCi?W
a = temp; zs!,PQF(
} else { X3zkUMk
data[k] = temp[j--]; Dd8*1,
b = temp[j]; d`9%:2qE
} g[<K FVlG
} Yt79W
} JK:i-
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/** V+My]9ki
* @param data MKIX(r(|
* @param l @]ydWd
* @param i 4'JuK{/ A7
*/ P)x&9OHV
private void insertSort(int[] data, int start, int len) { ~bU!4P}4j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9xL8 ];-
} GUyMo@g
} :tclYX
} TZ8:3ti
} =`fJ
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堆排序： ?B> {rj
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package org.rut.util.algorithm.support; Do-~-d4
:D(4HXHK%
import org.rut.util.algorithm.SortUtil; I6?n>
j} ^?3<
/** `)e5pK
* @author treeroot "%$jl0i_c
* @since 2006-2-2 F)dJws7-
* @version 1.0 Pi|WOE2
*/ #6O<!{PH6
public class HeapSort implements SortUtil.Sort{ G&qO{" Js
tQz=_;jy
/* (non-Javadoc) [Q(FBoI|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nT.i|(xd.
*/ c:QZ(8d]L
public void sort(int[] data) { ^2C)Wk$
MaxHeap h=new MaxHeap(); 5[<"_
h.init(data); @'UbTB!
for(int i=0;i h.remove(); UQZ<sp4v;
System.arraycopy(h.queue,1,data,0,data.length); O |45r
} FvX<(8'#a
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private static class MaxHeap{ OU2.d7
(C{l4
void init(int[] data){ z4GcS/3K
this.queue=new int[data.length+1]; ?#N: a
for(int i=0;i queue[++size]=data; K?]><z{
fixUp(size); &>Zm gz
} *4]u?R
} 04;E^,V
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private int size=0; tOUpK20q.@
Ltv!;^Q5
private int[] queue; *`D}voU
!e>+O^
public int get() { '0\,waEu
return queue[1]; 9]u=b\fzZ
} &6ymGo
dJvT2s.t[
public void remove() { rlUo#
SortUtil.swap(queue,1,size--); rV6&:\
fixDown(1); ^,-2";2Xh
} hA'i|;|ZYc
file://fixdown AvP$>Alc
private void fixDown(int k) { pl#2JA8
int j; Os)jfKn2
while ((j = k << 1) <= size) { Ry47Fze
if (j < size %26amp;%26amp; queue[j] j++; aMU0BS"
if (queue[k]>queue[j]) file://不用交换 7'IcgTWDZy
break; ~&}e8ah2
SortUtil.swap(queue,j,k); 3?%?J^/a
k = j; B3AWJ1o
} HB|R1<t;HB
} #uRj9|E7
private void fixUp(int k) { !=uaB.
while (k > 1) { + *xi&|%
int j = k >> 1; >O;V[H2[
if (queue[j]>queue[k]) $O'IbA
break; qV$\E=%fhM
SortUtil.swap(queue,j,k); jw 4B^2}
k = j; _^%DfMP3i\
} gT-"=AsxZQ
} 4Tdp;n\F
yg@8&;bP`
} L'?7~Cdls
gJ=y7yX
} ur$=%3vM
IGnP#@`5]
SortUtil： ;2y4^
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package org.rut.util.algorithm; W9D~:>^YP
dug^oc1
import org.rut.util.algorithm.support.BubbleSort; %&iodo,EP'
import org.rut.util.algorithm.support.HeapSort; 4 (c{%%
import org.rut.util.algorithm.support.ImprovedMergeSort; 4'~zuUs
import org.rut.util.algorithm.support.ImprovedQuickSort; (=-6'23q)
import org.rut.util.algorithm.support.InsertSort; -HU4Ow
import org.rut.util.algorithm.support.MergeSort; yM2}JsC
import org.rut.util.algorithm.support.QuickSort; <B&vfKO^h
import org.rut.util.algorithm.support.SelectionSort; \\ZCi`O
import org.rut.util.algorithm.support.ShellSort; Oq9E$0JW
y*#YIS56I
/** /lS5B6NU
* @author treeroot ]r\FC\n6e
* @since 2006-2-2 >bFrJz}
* @version 1.0 <kCOg8<y :
*/ /(u# D[
public class SortUtil { ]3Y J a
public final static int INSERT = 1; =5;tB
public final static int BUBBLE = 2; C=Tq/L w
public final static int SELECTION = 3; B,fVNpqo
public final static int SHELL = 4; X> T_Xc
public final static int QUICK = 5; ' ~1/*F%8
public final static int IMPROVED_QUICK = 6; -#Ys67,4N
public final static int MERGE = 7; XI+GWNAmJ
public final static int IMPROVED_MERGE = 8; Sq SiuO.D
public final static int HEAP = 9; M?_7*o]!
UOpSH{N
public static void sort(int[] data) { ~l8w]R3A
sort(data, IMPROVED_QUICK); 9|WV28PK:
} R > [2*o"
private static String[] name={ A<y]D.Z"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {.])'~[U
}; O2:1aG
m}(M{^\|
private static Sort[] impl=new Sort[]{ Z*+y?5+L"P
new InsertSort(), jf.WmiDC
new BubbleSort(), .lAPlJOO
new SelectionSort(), TbD $lx3>
new ShellSort(), 6j Rewj
new QuickSort(), D}`MY\H
new ImprovedQuickSort(), C]Q`!e
new MergeSort(), DYF(O-hJK
new ImprovedMergeSort(), "/ySHB[
new HeapSort() PLJDRp 2o
}; {%\@Z-9%q,
H;seT XL
public static String toString(int algorithm){ Ga_Pt8L6
return name[algorithm-1]; Z,DSTP\|
} R7 rO7M!
cw,|,uXq 6
public static void sort(int[] data, int algorithm) { q|}O-A*wa
impl[algorithm-1].sort(data); {oS/Xa
} 5,pEJ>dDD3
'ka}x~EF
public static interface Sort { &;bey4_J
public void sort(int[] data); !"ir}Y%
} / */"gz%
g~2=he\C
public static void swap(int[] data, int i, int j) { 3 Q~0b+k
int temp = data; =w3cF)&
data = data[j]; };R2M
data[j] = temp; $o.;}
} JAM]neKiX
} 9I:3