[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; |Btx&'m
} Q~8&pP8I!
int i1=l; Env}gCX
int i2=mid+1; w5JC2
for(int cur=l;cur<=r;cur++){ gJcL{]
if(i1==mid+1) O5n]4)<
data[cur]=temp[i2++]; BE@H~<E J
else if(i2>r) RBojT
data[cur]=temp[i1++]; vBQ?S2f
else if(temp[i1] data[cur]=temp[i1++]; yDBgSO{d
else u2Z^iY
data[cur]=temp[i2++]; :s5<AT Q
} /P:WQ*
} Ku\#Wj|YrP
J+*Y)k
} ^*~u4app
k |aOUW
改进后的归并排序: >Zp]vK~s
vM;dPE7
package org.rut.util.algorithm.support; 6L% R@r
S{|)9EKw
import org.rut.util.algorithm.SortUtil; -`1L[-<d=/
BGYm]b\j[
/** K`83C`w.
* @author treeroot P\4o4MF@K
* @since 2006-2-2 TVh7h`Eg
* @version 1.0 7^e}|l
*/ <cc0phr
public class ImprovedMergeSort implements SortUtil.Sort { 1OwkLy,P
X#C7r@H
private static final int THRESHOLD = 10; X{5DPhB,
$GKm`I"
/* e<wj5:M|
* (non-Javadoc) +s 0Bt '
* u5|e9(J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^i k|l=
*/ 4sgwQ$m)
public void sort(int[] data) { u:kY4T+Z
int[] temp=new int[data.length]; kEDZqUD
mergeSort(data,temp,0,data.length-1); L|'ME| '
} 9&FV=}MO
!d@`r1t
private void mergeSort(int[] data, int[] temp, int l, int r) { &\br_
int i, j, k; $7 Uk;xV
int mid = (l + r) / 2; xR%ayT.
if (l == r) ="eum7
return; Hjkgy%N
if ((mid - l) >= THRESHOLD) u1Yp5jp^K
mergeSort(data, temp, l, mid); IYC#H}
else 6df&B .gg
insertSort(data, l, mid - l + 1); f__WnW5h
if ((r - mid) > THRESHOLD) (:muxby%
mergeSort(data, temp, mid + 1, r); tB?S0;yXjd
else :QSW^x
insertSort(data, mid + 1, r - mid); uzA'D~)P
@z RB4d$
for (i = l; i <= mid; i++) { 4}FfHgpQ
temp = data; 0PbIWy'
} />7/S^
for (j = 1; j <= r - mid; j++) { =KD*+.'\/
temp[r - j + 1] = data[j + mid]; 6b)UoJxj
} 1g.9R@Kc$
int a = temp[l]; \gXx{rLW
int b = temp[r]; 1qN9bwRO
for (i = l, j = r, k = l; k <= r; k++) { *\vc_NP]
if (a < b) { 3k0%H]wt
data[k] = temp[i++]; bj^m<}
a = temp; uQ1;+P:L
} else { UL"3skV
data[k] = temp[j--]; ]997`,1b
b = temp[j]; 8H b|'Q|^
} ea+rjvm
} QYGxr+D
} *s4!;2ZhsU
=^M t#h."
/** j06oAer 9
* @param data Z9^$jw]
* @param l B K;w!]
* @param i 7y7y<`)I5
*/ :_zKUv]
private void insertSort(int[] data, int start, int len) { .?j8{>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O{R5<"g
} (%!R
} m(P)oqwM
} c!T{|'?
} sn#h=,*4`
Al]9/ML/m
堆排序： Q7%#3ML
8hp]+k_y
package org.rut.util.algorithm.support; YTh4&wm
eP?|U.on
import org.rut.util.algorithm.SortUtil; &Hxr3[+$
8[OiG9b
/** 2ow\d b
* @author treeroot 4Pdk?vHK;
* @since 2006-2-2 lukV G2wDL
* @version 1.0 &3J#"9_S
*/ {r8CzJ'f
public class HeapSort implements SortUtil.Sort{ ]f~YeOB@
x"80c(i
/* (non-Javadoc) |i8dI)b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \&90$>h
*/ 0^z$COCv
public void sort(int[] data) { uy{KV"%"^g
MaxHeap h=new MaxHeap(); 1hG O*cq!
h.init(data); BI]t}7
for(int i=0;i h.remove(); WG{/I/bJ_
System.arraycopy(h.queue,1,data,0,data.length); mio'm
} cf'Z#NfQ
?Gfe?
private static class MaxHeap{ V:J6eks_
Us5JnP5
void init(int[] data){ sSK$
this.queue=new int[data.length+1]; 8msDJ{,X
for(int i=0;i queue[++size]=data; t |hmEHUk
fixUp(size); Oa .%n9ec
} |VL,\&7rk
} GAlO<Mu
u{,^#I}
private int size=0; ZP<X#]$qb
tPHiz%
private int[] queue; '*;rm*n
~s_$a8
public int get() { ^B9wmxe
return queue[1]; A9gl|II
} 48`<{|r{
1<"kN^
public void remove() { f7s.\
SortUtil.swap(queue,1,size--); Dn?L
fixDown(1); jGCW^#GE
} cD6o8v4]]
file://fixdown =3p h:t
private void fixDown(int k) { bJD"&h5
int j; HvTQycG
while ((j = k << 1) <= size) { d6VKUAk'7>
if (j < size %26amp;%26amp; queue[j] j++; |T%/d#b~
if (queue[k]>queue[j]) file://不用交换 |&Q=9H*e
break; {cA )jW\'
SortUtil.swap(queue,j,k); L8J/GVmj
k = j; }2@$2YR[
} :O%O``xT
} =l+p nG
private void fixUp(int k) { Yt^+31/%
while (k > 1) { 6z*L9Vy($
int j = k >> 1; qC&<U
if (queue[j]>queue[k]) $7,dKC &
break; 3a0C<hW
SortUtil.swap(queue,j,k); ;xc
k = j; 6eD[)_?]y
} 4$"Lf'sH6
} PhS"tOGtX
dEiX!k$#
} {65X37W
o6R(BMwGa
} ^5+-7+-S
:EjIV]e
SortUtil： #C`!yU6(
ln.~>FO
package org.rut.util.algorithm; i=4bY[y
QQ9Q[c
import org.rut.util.algorithm.support.BubbleSort; rSk $]E]Z
import org.rut.util.algorithm.support.HeapSort; iR-O6*PTC
import org.rut.util.algorithm.support.ImprovedMergeSort; QWkw$mcf
import org.rut.util.algorithm.support.ImprovedQuickSort; b/EvcN8 }
import org.rut.util.algorithm.support.InsertSort; K*<n<;W
import org.rut.util.algorithm.support.MergeSort; S]>_o"|HV
import org.rut.util.algorithm.support.QuickSort; ^=ikxZyO
import org.rut.util.algorithm.support.SelectionSort; N?XN$hwdZ
import org.rut.util.algorithm.support.ShellSort; ,]MX&]
mR^D55k
/** k#.co~kS
* @author treeroot @&+ 1b=
* @since 2006-2-2 <3bh-)
* @version 1.0 C*9m `xh
*/ vC7sJIch2<
public class SortUtil { ZttL*KK
public final static int INSERT = 1; rW^&8E[
public final static int BUBBLE = 2; 580t@?
public final static int SELECTION = 3; zM!*r~*k$
public final static int SHELL = 4; Fi#t88+1
public final static int QUICK = 5; 7qk61YBLz
public final static int IMPROVED_QUICK = 6; ?9mY #_Of
public final static int MERGE = 7; ~$$V=$&
public final static int IMPROVED_MERGE = 8; !m;VWGl*
public final static int HEAP = 9; 2g$Wv :E3
K6X1a7
public static void sort(int[] data) { j405G4BVW
sort(data, IMPROVED_QUICK); vcmS]$}
} b6lL8KOu
private static String[] name={ sDiYm}W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .UcS4JU
}; `y\:3bQ4
4u&doSXR
private static Sort[] impl=new Sort[]{ 4aRYz\yT=
new InsertSort(), BhKxI
new BubbleSort(), TuU.yvkU
new SelectionSort(), /vhh2`
new ShellSort(), ax<0grK
new QuickSort(), 2'_sGAH
new ImprovedQuickSort(), uzo}?X#
new MergeSort(), $lqV(s
new ImprovedMergeSort(), jmIP c3O0
new HeapSort() QNo}nl/N
}; <L-L}\-I"
P(4[<'HO
public static String toString(int algorithm){ O ?4V($
return name[algorithm-1]; Q,$x6YwE
} ;i]cmy
R Q8okA
public static void sort(int[] data, int algorithm) { EPI*~=Z.U
impl[algorithm-1].sort(data); MS b{ve_
} =Yfs=+O
v=4TU\b%
public static interface Sort { }S&{ &gh
public void sort(int[] data); CUG6|qu
} q8oEb
1@y?OWC
public static void swap(int[] data, int i, int j) { xQ[YQ!l
int temp = data; ~EN@$N^h
data = data[j]; v<) }T5~r
data[j] = temp; )Q8Q#S
} ei5S<n
} itP_Vxo/H