[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; He^u+N@B
} ;$gZ?&
int i1=l; 0vbiq
int i2=mid+1; #K:|@d
for(int cur=l;cur<=r;cur++){ `@eo <6
if(i1==mid+1) Y>LgpO.
data[cur]=temp[i2++]; O)NEt
else if(i2>r) {Hxvt~P
data[cur]=temp[i1++]; O&YX V
else if(temp[i1] data[cur]=temp[i1++]; HQlhT
else 9t:P1
data[cur]=temp[i2++]; E#?*6/
} S(<r-bV<
} %upnXRzw
G?e"A0,
} hyqsMkW|
q{I,i(%m8
改进后的归并排序: 22lC^)`TE
02OL-bv}HS
package org.rut.util.algorithm.support; __<u!;f
4X,fb`
import org.rut.util.algorithm.SortUtil; `\LhEnIwu
<;}jf*A
/** `vs= CYs
* @author treeroot yDh(4w-~gk
* @since 2006-2-2 <$!^LKKzA
* @version 1.0 7 \)OWp
*/ )2t!= ua
public class ImprovedMergeSort implements SortUtil.Sort { foY=?mbL
c^0YuBps[
private static final int THRESHOLD = 10; kNqSBzg
{?tK]g#
/* mNS7/I\
* (non-Javadoc) o;bK 7D
* l1BbL5#1Q>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .1R:YNx{/
*/ _q*4+x
public void sort(int[] data) { rrBu6\D
int[] temp=new int[data.length]; 1d)wE4c=Z
mergeSort(data,temp,0,data.length-1); wO:!B\e
} *opf~B_e
Z@ AHe`A
private void mergeSort(int[] data, int[] temp, int l, int r) { I`Goc!5t
int i, j, k; ^3B)i=
int mid = (l + r) / 2; &<8Q/m]5
if (l == r) H{Tt>k
return; <X9 T}g
if ((mid - l) >= THRESHOLD) {.c(Sw}Eo
mergeSort(data, temp, l, mid); 0?kaXD
else wcz|Zy
insertSort(data, l, mid - l + 1); h&Thq52R
if ((r - mid) > THRESHOLD) |tL57Wu93
mergeSort(data, temp, mid + 1, r); tj:3R$a
else ANB@cK_
insertSort(data, mid + 1, r - mid); \\;i
<s/n8#i=H
for (i = l; i <= mid; i++) { 7d&_5Tj:
temp = data; g3[Zh=+]E
} P2J{Ml#
for (j = 1; j <= r - mid; j++) { U^jxKBq^
temp[r - j + 1] = data[j + mid]; Cw`8[)=}o
} )X*?M?~\
int a = temp[l]; p0Cp\.
int b = temp[r]; `CCuwe<v
for (i = l, j = r, k = l; k <= r; k++) { WmU5YZ(mAq
if (a < b) { WXz'H),R
data[k] = temp[i++]; ;M,u,KH)/
a = temp; C? pi8Xg
} else { VA4>!t)
data[k] = temp[j--]; J[E_n;d1
b = temp[j]; {z)&=v@
} u{Jv6K,
} cI}qMc
} W_k;jy_{9
4.]xK2sW
/** BQYj"Wi
* @param data HU[a b
* @param l \~V ZY
* @param i 9=,^^,q
*/ !e~Yp0gX#
private void insertSort(int[] data, int start, int len) { Jh1Q)05
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ki#({~
} Hg8n`a;R
} FO"8B
} 3V")~m
} fQ>=\*b9x^
(_&W@:"z
堆排序： }1]E=!?)&
VayU
package org.rut.util.algorithm.support; \QF\Bh
rMDo5Z2
import org.rut.util.algorithm.SortUtil; 2+KOUd&jS
<~aQ_l
/** _@es9
* @author treeroot K:}~8 P>^
* @since 2006-2-2 ^/;W;C{4
* @version 1.0 HI}$Z=C
*/ BR8W8nRb
public class HeapSort implements SortUtil.Sort{ $HjKELoJ<
?Y6MC:l<
/* (non-Javadoc) CPRv"T;?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,:yv T6)p
*/ =n $@
public void sort(int[] data) { En@] xvE
MaxHeap h=new MaxHeap(); `x;8,7W;B
h.init(data); ) V}q7\G~
for(int i=0;i h.remove(); k+k&}8e
System.arraycopy(h.queue,1,data,0,data.length); .54E*V1
} f.f5f%lO~
U)oH@/q
private static class MaxHeap{ =GO/r;4
f"XFf@!
void init(int[] data){ p#vZYwe=L
this.queue=new int[data.length+1]; ^B9rt\,q
for(int i=0;i queue[++size]=data; XD\RD
fixUp(size); xw60l&s.\L
} l!2hwRR
} 8?qEv,W
eF5?4??
private int size=0; HV:mS*e
cv fh:~L
private int[] queue; "BB#[@
<pd6,l\
public int get() { 5j(3pV`_
return queue[1]; y w"Tw
} qX'w}nJ}H}
xl5n(~g)p
public void remove() { $YDZtS&h
SortUtil.swap(queue,1,size--); @g|Eb}t
fixDown(1); S@suPkQ<>
} nJ/wtw
file://fixdown F?j;3@z[A
private void fixDown(int k) { N*t91 X
int j; r4Ygy/%
while ((j = k << 1) <= size) { ZdQm&?
if (j < size %26amp;%26amp; queue[j] j++; (]'Q!MjGa
if (queue[k]>queue[j]) file://不用交换 ]+\@_1<ZI
break; /BWJ)6#H
SortUtil.swap(queue,j,k); MWSx8R)PN
k = j; ?f+w:FO
} U_a)g X
} %N)o*H&
private void fixUp(int k) { v4L#^Jw(^p
while (k > 1) { j=v1:E
int j = k >> 1; .8is!TT
if (queue[j]>queue[k]) o l67x
break; 1jZ:@M:
SortUtil.swap(queue,j,k); rI&GM |
k = j; rl)(4ad=
} w>I>9O}(`
} 7^k`:Z
cmDskQ:
} E-,74B&H
A.9,p
} H[o'j@0
&]~z-0`$!
SortUtil： @+",f]
,x5`5mT3
package org.rut.util.algorithm; sr\lz}JW
mi|O)6>8n
import org.rut.util.algorithm.support.BubbleSort; ?{#P.2
import org.rut.util.algorithm.support.HeapSort; 6y)xMX
import org.rut.util.algorithm.support.ImprovedMergeSort; HtOo*\Ne
import org.rut.util.algorithm.support.ImprovedQuickSort; jY-i`rJN
import org.rut.util.algorithm.support.InsertSort; %8H*}@n
import org.rut.util.algorithm.support.MergeSort; b2 ~~!C
import org.rut.util.algorithm.support.QuickSort; y(|6`
import org.rut.util.algorithm.support.SelectionSort; Gy[;yLnX
import org.rut.util.algorithm.support.ShellSort; $Aww5G5e
z602(mxGg
/** <[xxCW(2
* @author treeroot GY4:9Lub7
* @since 2006-2-2 p7(xk6W
* @version 1.0 EWN$ILdD
*/ .<v0y"amJ
public class SortUtil { ToJV.AdfT
public final static int INSERT = 1; Ygn"7
public final static int BUBBLE = 2; 2F-!SI
public final static int SELECTION = 3; lj.z>
public final static int SHELL = 4; 84P^7[YX>
public final static int QUICK = 5; h$ M+Yo+
public final static int IMPROVED_QUICK = 6; k]x64hgm
public final static int MERGE = 7; JGIN<J85e
public final static int IMPROVED_MERGE = 8; ~\hA-l36
public final static int HEAP = 9; I/9ZUxQCyG
t~p9iGX<
public static void sort(int[] data) { zW%-Z6%D
sort(data, IMPROVED_QUICK); !mpRLBH
} D8_m_M|P
private static String[] name={ xMtl<Na
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?n/:1LN,
}; h 88iZK
f(DGC2R <
private static Sort[] impl=new Sort[]{ yhEU*\:
new InsertSort(), V_U$JKJ1=
new BubbleSort(), q /|<>s
new SelectionSort(), yY*OAC
new ShellSort(), H;s0|KRgJ
new QuickSort(), uc%75TJ@
new ImprovedQuickSort(), DVD}
new MergeSort(), ;^:~xJFx|
new ImprovedMergeSort(), uf`o\wqU
new HeapSort() ksY^w+>(!
}; >0+m
IGql^,b
public static String toString(int algorithm){ {#q<0l
return name[algorithm-1]; <PW*vo9v
} xN2M|E]
X=(8t2
public static void sort(int[] data, int algorithm) { !`,6E`Y#
impl[algorithm-1].sort(data); &X_I^*
} O<f_-n@G|
X =S;8=N
public static interface Sort { |IH-a"
public void sort(int[] data); )rhKWg
} dz5bW>
-J!F((jt
public static void swap(int[] data, int i, int j) { -+|0LXo
int temp = data; B/E1nBobC
data = data[j]; D8h?s
data[j] = temp; }<FBcc(n
} Qo?"hgjlqm
} (0D0G-r: