[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; 6xs_@Vk|d
} /-wAy-W
int i1=l; kzhncku
int i2=mid+1; JkazB1h
for(int cur=l;cur<=r;cur++){ i6)$pARp
if(i1==mid+1) j*m7&wOE
data[cur]=temp[i2++]; _MfB,CS
else if(i2>r) ZJ9J*5!C
data[cur]=temp[i1++]; l@FPTHq
else if(temp[i1] data[cur]=temp[i1++]; &46h!gW
else .17WF\1HC.
data[cur]=temp[i2++]; -{i;!XE$SR
} 5-Vdq
} ?Sj3-*/?
SU.T0>w
} Si#b"ls'
(~Pb,Q
改进后的归并排序: |?CR|xqT
zg!;g`Z@S
package org.rut.util.algorithm.support; TOo0rcl
Kb~s'cTxIO
import org.rut.util.algorithm.SortUtil; m}] bP
@Y'BqDFlZ
/** DUc -D==
* @author treeroot Iaf"j 2B
* @since 2006-2-2 }vkrWy^
* @version 1.0 |->{NUZ{
*/ (&4aebkZO
public class ImprovedMergeSort implements SortUtil.Sort { q/Dc*Qn m
<@9p|[!
private static final int THRESHOLD = 10; =PiDZS^"
HTK79 +
/* TY[1jW~{r
* (non-Javadoc) g&y'#,'Q~,
* )6#dxb9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e%w>QN`
*/ ~y%8uHL:
public void sort(int[] data) { KH)(xB=
int[] temp=new int[data.length]; XUmL8
mergeSort(data,temp,0,data.length-1); % (R10G
} {O,D9<
pOlo_na}[
private void mergeSort(int[] data, int[] temp, int l, int r) { P8DY*B k
int i, j, k; [?mDTD8zU
int mid = (l + r) / 2; UXVjRY`M.\
if (l == r) H
return; ~d :Z|8
if ((mid - l) >= THRESHOLD) s7IaU|m
mergeSort(data, temp, l, mid); F i?2sa
else je1f\N45
insertSort(data, l, mid - l + 1); 0x!XE|7I
if ((r - mid) > THRESHOLD) Yhl {'
mergeSort(data, temp, mid + 1, r); 3Xgf=yG:M
else ?y82S*sb#
insertSort(data, mid + 1, r - mid); \TSt
3!M;Z7qF]
for (i = l; i <= mid; i++) { beFVjVVHq
temp = data; E(A7DXzbR
} mw9;LNi\D
for (j = 1; j <= r - mid; j++) { z5PFppSQ
temp[r - j + 1] = data[j + mid]; GUJ[2/V~A
} sZ #Ck"n
int a = temp[l]; jy`jxOoG~Z
int b = temp[r]; F|q-ZlpW-
for (i = l, j = r, k = l; k <= r; k++) { r- 0BLq]~{
if (a < b) { &o$E1;og
data[k] = temp[i++]; euO!+9p
a = temp; Hzs]\%"
} else { |><hdBQXX<
data[k] = temp[j--]; = R|?LOEK+
b = temp[j]; )=TD}Xb
} /NCEZ@2BN,
} xg~q'>
} _ETG.SYq
+v:t
/** .8hB <G
* @param data 8jW{0&ox)
* @param l elCDPZTf
* @param i :Xc%_&)
*/ Mi&,64<
private void insertSort(int[] data, int start, int len) { =s`\W7/;{-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1UX"iOx(
} 6%Ap/zvCZ>
} ALS\}_8
} w(pLU$6X
} |LA./%U
$lmbeW[0
堆排序： )Q\nR`k
2%"2~d7
package org.rut.util.algorithm.support; GGk.-Ew@
0qXd?z$
import org.rut.util.algorithm.SortUtil; !_rAAY
WUx}+3eWv
/** BuMBnbT
* @author treeroot Xk%92Pto
* @since 2006-2-2 R'f|1mt
* @version 1.0 @0A7d $J(
*/ <U`lh
public class HeapSort implements SortUtil.Sort{ 7UvfXzDNC
A\Rkt;:
/* (non-Javadoc) Iih~W&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <wUDcF
*/ W(ITs}O
public void sort(int[] data) { ^Ts|/+}'i
MaxHeap h=new MaxHeap(); 8<ZxE(v
h.init(data); o@j]yA.5)
for(int i=0;i h.remove(); 8B;wn<O
System.arraycopy(h.queue,1,data,0,data.length); ;$Q`JN=
} 7?<.L
@ SaU2
private static class MaxHeap{ 1 zIFQ@
j#d=V@=a
void init(int[] data){ d;O16xcM/
this.queue=new int[data.length+1]; XB, 2+
for(int i=0;i queue[++size]=data; t98t&YUpm
fixUp(size); j*@^O`^v
} xayo{l=uGv
} -b+VzVJZ
8px@sXI*`
private int size=0; C o v,#j j
x`K<z J
private int[] queue; D@ut -J(.
b,"gBg
public int get() { 7YT%.ID
return queue[1]; bb}zn'xC
} U_ n1QU
|}N -5U
public void remove() { ;0DTf
SortUtil.swap(queue,1,size--); 9/3gF)I}
fixDown(1); xtWQ.
} &}:'YK*X
file://fixdown \'Oi0qo>
private void fixDown(int k) { ZHT_o\
int j; o?(({HH
while ((j = k << 1) <= size) { x01n
if (j < size %26amp;%26amp; queue[j] j++; (os}s8cIh
if (queue[k]>queue[j]) file://不用交换 +{U0PI82
break; #DK@&Gv
SortUtil.swap(queue,j,k); ^\=<geEj
k = j; "8}p>gS
} As0E'n85
} D^ZG-WR
private void fixUp(int k) { ;hb;%<xqT
while (k > 1) { wdg,dk9e$
int j = k >> 1; =K'X:UM
if (queue[j]>queue[k]) AjBwj5K
break; _N!L?b83P
SortUtil.swap(queue,j,k); 2"+8NfFl
k = j; yh0zW $
} *R1m=
} IcmTF #{D
AyHhq8Y
} eV:I :::
A|>~/OW=@
} gDbj!(tm
dsck:e5agZ
SortUtil： lz2B,#
3z7SK Gy
package org.rut.util.algorithm; nvY3$ Ty
Tbf't^Ot$
import org.rut.util.algorithm.support.BubbleSort; MLwh&I9)
import org.rut.util.algorithm.support.HeapSort; i) v ]
import org.rut.util.algorithm.support.ImprovedMergeSort; <q@/Yy32
import org.rut.util.algorithm.support.ImprovedQuickSort; @@~OA>^
import org.rut.util.algorithm.support.InsertSort; j}9][Fm1*
import org.rut.util.algorithm.support.MergeSort; {l$DNnS
import org.rut.util.algorithm.support.QuickSort; /)RyRS8c
import org.rut.util.algorithm.support.SelectionSort; EB R,j_
import org.rut.util.algorithm.support.ShellSort; ]}7FTMGbY
eC`} oEz
/** |f5WN&c
* @author treeroot 32h}+fd
* @since 2006-2-2 1;_tu
* @version 1.0 7<FI[
*/ b(^/WCykH
public class SortUtil { W^j;"qj
public final static int INSERT = 1; Mttt]]
public final static int BUBBLE = 2; 7A:k
public final static int SELECTION = 3; ToMvP B);
public final static int SHELL = 4; zT$-%
public final static int QUICK = 5; 4lrF{S8
public final static int IMPROVED_QUICK = 6; wUb5[m
public final static int MERGE = 7; wW2b?b{*Z
public final static int IMPROVED_MERGE = 8; "&h{+DHS
public final static int HEAP = 9; hr@c7/L
Zo$,{rl
public static void sort(int[] data) { : :;YS9e
sort(data, IMPROVED_QUICK); xvo""R/g8
} K1y]
private static String[] name={ G<1)NT\u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cj{+DXT
}; p;8I@~dh
d^uE4F}
private static Sort[] impl=new Sort[]{ ,Dh+-}
new InsertSort(), O7<--
new BubbleSort(), vG E;PwR
new SelectionSort(), r 0mA
new ShellSort(), m~7[fgN2
new QuickSort(), ]QM{aSvXA
new ImprovedQuickSort(), Iv,Ub_Ll9
new MergeSort(), 2rxZN\gyL
new ImprovedMergeSort(), T''PzY!Qf
new HeapSort() tE|W8=be/
}; jnF-kia
!97U2L4
public static String toString(int algorithm){ ~|y$^qy?U
return name[algorithm-1]; W`^euBr7R>
} ad <z+a
0 0JH*I
public static void sort(int[] data, int algorithm) { .T!R&#]n
impl[algorithm-1].sort(data); ".0~@W0
} =;tDYuFc!
[\i0@
public static interface Sort { S"-q*!AhK
public void sort(int[] data); D1xIRyc/
} k@}?!V*l
Evjvaa^
public static void swap(int[] data, int i, int j) { R0yPmh,{
int temp = data; cXcrb4IKD
data = data[j]; pTzwyj!SD
data[j] = temp; +=_^4
} o`tOnwt
} I`e$U