[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; [ky6E*dV`
} ![]I%'s
int i1=l; )c >B23D
int i2=mid+1; <ii1nz
for(int cur=l;cur<=r;cur++){ &:I +]G/W
if(i1==mid+1) LZC?383'
data[cur]=temp[i2++]; `-EH0'w~"
else if(i2>r) H..ZvGu
data[cur]=temp[i1++]; G+X[R^RD
else if(temp[i1] data[cur]=temp[i1++]; d74g|`/
else !GGGh0Bj
data[cur]=temp[i2++]; TWR$D
} jJ"EGFa8
} s P4,S(+e
jc.JX_/
} zMYd|2bc
"I}Z2
改进后的归并排序: l5Wa'~0qA
0yC`9g)(
package org.rut.util.algorithm.support; !HjNx%o5<
mHEf-6|C`
import org.rut.util.algorithm.SortUtil; 4G8nebv
ivX37,B\bS
/** <j 9Mt=8M
* @author treeroot "x|NG,<[9
* @since 2006-2-2 %L13Jsw
* @version 1.0 XCIa2Syo
*/ +Sd,l>8\
public class ImprovedMergeSort implements SortUtil.Sort { G(0y|Eq
"c/s/$k//
private static final int THRESHOLD = 10; Ryq"\Q>+
5nx<,-N*BP
/* yLz,V}
* (non-Javadoc) y /:T(tk$
* \;*}zX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d$_q=ywc
*/ ?5yH'9zE
public void sort(int[] data) { sjzXJ`s
int[] temp=new int[data.length]; {y:#'n
mergeSort(data,temp,0,data.length-1); p=~h|(M|
} l/ rZcf8z
F%#*U82
private void mergeSort(int[] data, int[] temp, int l, int r) { !-5S8b
int i, j, k; 3K#mF7)a
int mid = (l + r) / 2; _rMT{q3
if (l == r) 5':Gu}Vq
return; 8_IOJ]:w
if ((mid - l) >= THRESHOLD) _+*/~E
mergeSort(data, temp, l, mid); Ybt_?Q9#]
else ?ng14e
insertSort(data, l, mid - l + 1); 9vp%6[
if ((r - mid) > THRESHOLD) PNJe&q0*
mergeSort(data, temp, mid + 1, r); f>8B'%]
else !rXcGj(k
insertSort(data, mid + 1, r - mid); >WGP{
kWs+2j
for (i = l; i <= mid; i++) { !FB \h<6
temp = data; L8dU(P
} o3F|#op
for (j = 1; j <= r - mid; j++) { d=?Mj]
temp[r - j + 1] = data[j + mid]; 3Rd`Ysp
} *f TG8h
int a = temp[l]; j6e}7
int b = temp[r]; 7rdw`
for (i = l, j = r, k = l; k <= r; k++) { {x[;5TM
if (a < b) { X7H'Uk9:
data[k] = temp[i++]; `8Jq~u6_Z
a = temp; Vm~qk
} else { '(*&Ax
data[k] = temp[j--]; x[vBK8
b = temp[j]; ~ThVap[*
} 7?MB8tJ5r4
} 5c]}G.NV
} sOl>5:D6
oSn! "<x
/** Qsg/V]
* @param data 5 o#<`_=J
* @param l {Z#e{~m#
* @param i >I4p9y(u
*/ |.(CIu~b
private void insertSort(int[] data, int start, int len) { 4bi NGl~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zj>aaY
} h`5YA89
} J%\- 1
} AfRW=&xdT
} X&(<G
eyT>wma0
堆排序： PFS;/
V06CCy8n
package org.rut.util.algorithm.support; `ke3+%uj o
9c6czirwR^
import org.rut.util.algorithm.SortUtil; skIiJ'db
bo@,4xw
/** ^kn^CI6
* @author treeroot s.yq}Q
* @since 2006-2-2 (*6m^
* @version 1.0 FxCZRo&
*/ 7v_i>_m]
public class HeapSort implements SortUtil.Sort{ JiFA]M`^Q
S\e&?Y`
/* (non-Javadoc) qKdS7SoS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N0Efw$u
*/ Vi|7%!j<
public void sort(int[] data) { y?pD(u
MaxHeap h=new MaxHeap(); o"p^/'ri
h.init(data); c,y|c`T 2
for(int i=0;i h.remove(); %MJL5
System.arraycopy(h.queue,1,data,0,data.length); bLgL0}=n
} YijMF/Uyb
S&4+ e:K
private static class MaxHeap{ 90/vJN
S!;LF4VA
void init(int[] data){ B<|VeU
this.queue=new int[data.length+1]; mC i[Ps
for(int i=0;i queue[++size]=data; .u1X+P7
fixUp(size); ]~-*hOcQ4
} _1^8xFe2
} mZ~qG5@/F
}I]j&\
private int size=0; n/QfdAg
q!6|lZB3
private int[] queue; Hm%g_Mt
DY9fF4[9a
public int get() { :{LAVMG&^
return queue[1]; 2fl4h<V
} yu)q4C7ek
Q>.BQ;q]
public void remove() { ^0^( u
SortUtil.swap(queue,1,size--); ,;_rIO"
fixDown(1); egm)a
} XrF3kz!44
file://fixdown A1^Ga5 B>
private void fixDown(int k) { VFv9Q2/.
int j; M`GP^Ta
while ((j = k << 1) <= size) { 5Go0}'*%
if (j < size %26amp;%26amp; queue[j] j++; Q48+O?&
if (queue[k]>queue[j]) file://不用交换 }e<'BIME
break; }N3V5cab
SortUtil.swap(queue,j,k); 3bC+Mco
k = j; ><;Q@u5~
} kt^yj"C>
} D+Cm<ZT~
private void fixUp(int k) { 5h0>!0
while (k > 1) { R A:jzht
int j = k >> 1; ![ZmV
if (queue[j]>queue[k]) 57~Uqt
break; nV}8M
SortUtil.swap(queue,j,k); 8j%'9vPi
k = j; !tEe\K\e
} 9)+@0fG)
} -G9|n#zCU
G.g|jP'n
} iq?l#}]
eNRs&^
} n~tqO!q
{<2>6 _z
SortUtil： hd B |#t
#,L~w
package org.rut.util.algorithm; \m4T3fy
ZK6Hvc0
import org.rut.util.algorithm.support.BubbleSort; +t98@
import org.rut.util.algorithm.support.HeapSort; DkgUvn/S
import org.rut.util.algorithm.support.ImprovedMergeSort; z8HsYf(!
import org.rut.util.algorithm.support.ImprovedQuickSort; 9R p2W
import org.rut.util.algorithm.support.InsertSort; f1mHN7hxW
import org.rut.util.algorithm.support.MergeSort; !VwmPAMr#v
import org.rut.util.algorithm.support.QuickSort; y4@gGC=
import org.rut.util.algorithm.support.SelectionSort; Yi(1^'Bi
import org.rut.util.algorithm.support.ShellSort; brh=NAzt
u$%A#L[
/** B5ea(j
* @author treeroot wu)Wg-dT
* @since 2006-2-2 i9rS6<V'
* @version 1.0 A>=E{
*/ +4et7
public class SortUtil { %,\=s.~1
public final static int INSERT = 1; xRum*}|4
public final static int BUBBLE = 2; BOvF)4`
public final static int SELECTION = 3; y,E.SB
public final static int SHELL = 4; s)zJT
public final static int QUICK = 5; }`xdWY
public final static int IMPROVED_QUICK = 6; _;hf<|c
public final static int MERGE = 7; OfTfNhpK
public final static int IMPROVED_MERGE = 8; 5RF4]$zT
public final static int HEAP = 9; 0,_b)
;o0#(xVz
public static void sort(int[] data) { %@?A_jS
sort(data, IMPROVED_QUICK); TVaA>]Fv
} {$d<1y^
private static String[] name={ ,2L$G&?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X32C}4-B
}; gl{B=NN
a 7#J2r
private static Sort[] impl=new Sort[]{ }#1/fok
new InsertSort(), ~S*b
new BubbleSort(), yb2}_k.JG
new SelectionSort(), bFY~oa%C
new ShellSort(), ba3*]01Yb
new QuickSort(), /7D<'MF
new ImprovedQuickSort(), ,\YAnKn6_
new MergeSort(), mM_ k^4:
new ImprovedMergeSort(), qnChM;)
new HeapSort() `zA#z />
}; 1vnYogL
, sjh^-;
public static String toString(int algorithm){ thc <xxRP
return name[algorithm-1]; _Mk7U@j+9
} +D&Pp0xe
[Wi1|]X"G
public static void sort(int[] data, int algorithm) { IXpc,l `
impl[algorithm-1].sort(data); jq-l5})h
} eF~dQ4RZ
rf.`h{!!
public static interface Sort { *$,:m
public void sort(int[] data); :"Y*<=x#2
} s?2$ue&-f
\?**2{9&)
public static void swap(int[] data, int i, int j) { Kcy@$uF{2
int temp = data; [;A[.&6
data = data[j]; u 8^{
data[j] = temp; /mA,F;
} X6\ sF"E
} >yB(lKV