[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; )H(i)$I
} 055C1RV%
int i1=l; ![9$ru
int i2=mid+1; -&l%CR,U
for(int cur=l;cur<=r;cur++){ {gh<SZsE
if(i1==mid+1) +kN,OK~
data[cur]=temp[i2++]; Zc'^iDAY
else if(i2>r) ,b4oV
data[cur]=temp[i1++]; uS5G(}[
else if(temp[i1] data[cur]=temp[i1++]; 25 cJA4
else (hEg&@
data[cur]=temp[i2++]; _y&XFdp
} \q\"=
} 0S96x}]J B
q%LjOPE V
} [*M':
BA[ uO3\4
改进后的归并排序: #p ;O3E@
#\ uB!;Q
package org.rut.util.algorithm.support; UA|\D]xe
^a<kp69qS
import org.rut.util.algorithm.SortUtil; U\(71=
+NbiUCMX
/** `hdN 6PgK
* @author treeroot }?o4MiLB
* @since 2006-2-2 '{-Ic?F<P
* @version 1.0 W-*HAS
*/ nxB[To*P
public class ImprovedMergeSort implements SortUtil.Sort { zz!jt A
*d`KD64
private static final int THRESHOLD = 10; bp<,Xfl
3"juj'
/* NeJ->x,
* (non-Javadoc) 'E&tEbY
* AGm=0Om
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *?\u5O(
*/ UVXSW*$
public void sort(int[] data) { w{t]^w:
int[] temp=new int[data.length]; W*%(J$E
mergeSort(data,temp,0,data.length-1); zdw* ?C
} wX$|(Y}
pKno~jja
private void mergeSort(int[] data, int[] temp, int l, int r) { \B^NdG5Y
int i, j, k; M4D @G
int mid = (l + r) / 2; OE}FZCXF
if (l == r) xZ6x`BET-
return; uq;yR[w"
if ((mid - l) >= THRESHOLD) RL$%Vy0
mergeSort(data, temp, l, mid); &Q#*Nnb3
else li,rPUCt
insertSort(data, l, mid - l + 1); $s4.Aj
if ((r - mid) > THRESHOLD) z(>QGzyc
mergeSort(data, temp, mid + 1, r); ,`02fMOLc
else *{P/3yH
insertSort(data, mid + 1, r - mid); lXZ*Pb<j
_-3n'i8
for (i = l; i <= mid; i++) { 0n'vF&E8
temp = data; }%z%}V@(&
} ;>L8&m)R5
for (j = 1; j <= r - mid; j++) { zvVo-{6
temp[r - j + 1] = data[j + mid]; t0GJ$])
} fERO(o
int a = temp[l]; Xhq6l3M
int b = temp[r]; -Lu&bVt<>
for (i = l, j = r, k = l; k <= r; k++) { R}cNhZC
if (a < b) { ec`re+1r
data[k] = temp[i++]; +*Z'oCBJ,
a = temp; p_(En4QSH
} else { rlGv6)vb
data[k] = temp[j--]; -7]j[{?w
b = temp[j]; YSB=nd_
} d^J)Mhju
} PZ`11#bbm
} zj(V\y&H
g8l6bh$}
/** H%XF~tF:
* @param data l? U!rFRq`
* @param l E3l*_b0
* @param i ":vEWp+g
*/ UfPHV%Wd
private void insertSort(int[] data, int start, int len) { 1]eRragm"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k|\M(Z*(P
} V.z8 ]iG
} wMj#.Jh
} _Z!@#y@j
} 8#VD u(
2aX*|DGpw
堆排序： f*B-aj#
yi*EobP
package org.rut.util.algorithm.support; A=5Ebu!z
n=bdV(?4
import org.rut.util.algorithm.SortUtil; 7KX27.~F
o{! :N>(
/** ! xG*W6IT
* @author treeroot \Dy|}LE
* @since 2006-2-2 jS~Pdz
* @version 1.0 jeJgDAUv
*/ `d$@1
public class HeapSort implements SortUtil.Sort{ -YAtM-VL
|oke)w=gn
/* (non-Javadoc) QxdC[t$Lp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g27'il
*/ 9aY8`B
public void sort(int[] data) { mHHlm<?]
MaxHeap h=new MaxHeap(); BkGExz
h.init(data); E "}@SaB-
for(int i=0;i h.remove(); : S3+UT
System.arraycopy(h.queue,1,data,0,data.length); _1&Ar4:
} 9i}$245lB
y:}qoT_.
private static class MaxHeap{ TKv!wKI
a!E22k?((z
void init(int[] data){ *$W&jfW
this.queue=new int[data.length+1]; |Rz.Pt6
for(int i=0;i queue[++size]=data; DegbjqZ#
fixUp(size); /De~K+w7o
} .= ?*Wp
} cO*g4VL"[
N UX |
private int size=0; QJRnpN/
sHc-xnd
private int[] queue; T"W<l4i-
+IWH7qRtp
public int get() { ;//9,x9;t
return queue[1]; U`i5B;k}-
} P+}~6}wJE
ft6)n T/"&
public void remove() { 8zD>t~N2C
SortUtil.swap(queue,1,size--); !43!JfD
fixDown(1); l^9gFp~I
} lQHF=Jex
file://fixdown LWT\1#
private void fixDown(int k) { L|T?,^
int j; Rbf6/C
while ((j = k << 1) <= size) { , :#bo]3
if (j < size %26amp;%26amp; queue[j] j++; YE{ [f@i0
if (queue[k]>queue[j]) file://不用交换 .{h"0<x
break; z6C(?R
SortUtil.swap(queue,j,k); AtG~!)hG
k = j; _(F-(X|
} )6C+0b*
} dHXe2rTE;&
private void fixUp(int k) { eMC^ORdY
while (k > 1) { ovTL'j!
int j = k >> 1; p>`rTaeZg
if (queue[j]>queue[k]) Iz09O:ER
break; 1xW!j!A;
SortUtil.swap(queue,j,k); B/1j4/MS
k = j; Oh*~+/u}q
} fx5S2%f^
} bGH#s {'5
j)mU`b_
} A~bSB n: '
_|#abLh%
} B2ln8NF#Q
)}`z<)3jP
SortUtil： 6iyl8uL0J
#dWz,e3
package org.rut.util.algorithm; !H\oQv-I
sv%X8
import org.rut.util.algorithm.support.BubbleSort; N|DI k
import org.rut.util.algorithm.support.HeapSort; qY#*LqV
import org.rut.util.algorithm.support.ImprovedMergeSort; UhDQl%&He
import org.rut.util.algorithm.support.ImprovedQuickSort; {r&mNbz
import org.rut.util.algorithm.support.InsertSort; 6:#o0OeBP
import org.rut.util.algorithm.support.MergeSort; K=[7<b,:3
import org.rut.util.algorithm.support.QuickSort; \5r^D|Rp}
import org.rut.util.algorithm.support.SelectionSort; 9:USxFM
import org.rut.util.algorithm.support.ShellSort; 't5ufAT
#cfiN b}GX
/** ;\mX=S|a
* @author treeroot $v;WmYTJ
* @since 2006-2-2 T(D6'm:X
* @version 1.0 @(sz"
*/ <eG|`
public class SortUtil { 1_]X
public final static int INSERT = 1; \%a0Lp{ I
public final static int BUBBLE = 2; 2d[q5p
public final static int SELECTION = 3; L/tpT?$fi
public final static int SHELL = 4; ?$f.[;mh
public final static int QUICK = 5; 4H-eFs%5
public final static int IMPROVED_QUICK = 6; yxt"vm;
public final static int MERGE = 7; ]<>cjk.ya
public final static int IMPROVED_MERGE = 8; =6[.||9
public final static int HEAP = 9; u?Ffqt9'
?s^qWA
public static void sort(int[] data) { )j36Y =r3
sort(data, IMPROVED_QUICK); ,<rC,4-F<
} .`OU\LA
private static String[] name={ F}_b7|^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;'n%\*+fHH
}; =GX5T(P8k
+#FqC/`l
private static Sort[] impl=new Sort[]{ 7 m{lOR
new InsertSort(), %} ``:
new BubbleSort(), yW|J`\`^T
new SelectionSort(), eJ?oz^
new ShellSort(), lKf58 mB
new QuickSort(), I`V<Sh^Qd
new ImprovedQuickSort(), bw P=f.
new MergeSort(), ,>a!CnK=
new ImprovedMergeSort(), 90Ki.K0
new HeapSort() k:Pn.<
}; gXdMGO>
0~qc,-)3
public static String toString(int algorithm){ Qo#]Lo> \g
return name[algorithm-1]; V+E8{|dYL
} 8Sr'
,UY1.tR(
public static void sort(int[] data, int algorithm) { .Fo#Dmq3
impl[algorithm-1].sort(data); [I *_0
} |(>`qL{|
QoZV6
public static interface Sort { lmeTW0U@9(
public void sort(int[] data); tAAMSb9[d
} n~I-mR)"
Z}+}X|
public static void swap(int[] data, int i, int j) { u<edO+
int temp = data; WO qDW~
data = data[j]; a2Ak?W1
data[j] = temp; -l= 4{^pK
} d0:LJ'<Q
} !O_G%+>5W