[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; z?GtC{L9
} .=) *Qx+
int i1=l; #c9MVQ_
int i2=mid+1; g!i45]6[Nw
for(int cur=l;cur<=r;cur++){ !uA'0U?ky
if(i1==mid+1) Ex6Kxd}8
data[cur]=temp[i2++]; "2 D{X
else if(i2>r) =FMrVE
data[cur]=temp[i1++]; TQOJN
else if(temp[i1] data[cur]=temp[i1++]; @6-3D/=
else Jg$ NYs.xZ
data[cur]=temp[i2++]; D0Ls~qr
} ]qx!51S
} 21] K7
<~e*YrJ?-
} [q^pMH#U"
aHPx'R
改进后的归并排序: `W7;-
#IeG/t(
package org.rut.util.algorithm.support; < B!f;
4$4Tx9C
import org.rut.util.algorithm.SortUtil; Psm9hP :m
y,c\'}*H
/** 7,Q7`}gBf
* @author treeroot rMJ4w['J=
* @since 2006-2-2 K3&k+~$
* @version 1.0 slLTZ]
*/ jU}
public class ImprovedMergeSort implements SortUtil.Sort { S<5.}cR
T,B%iZgCh
private static final int THRESHOLD = 10; K k^!P*#
3Qp6$m
/* G$~hAZ
* (non-Javadoc) ,S?:lQuK5
* [3qJUJM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) % QaWg2Y=
*/ UM'JK#P"
public void sort(int[] data) { ,pW^>J
int[] temp=new int[data.length]; S-brV\v7
mergeSort(data,temp,0,data.length-1); 2(GLc*B>
} S Z &[o&H
{q&A/
private void mergeSort(int[] data, int[] temp, int l, int r) { uuy0fQQ8ti
int i, j, k; 5KssfI a
int mid = (l + r) / 2; $<f+CtD4
if (l == r) wD@ wOC
return; _b &Aa%
if ((mid - l) >= THRESHOLD) 7/\SN04l
mergeSort(data, temp, l, mid); `2'*E\
else :k~ p=ko
insertSort(data, l, mid - l + 1); 6X$\:>
if ((r - mid) > THRESHOLD) ^!O2Fw
mergeSort(data, temp, mid + 1, r); u;8bbv4
else b+BX >$
insertSort(data, mid + 1, r - mid); 3W3d $
L.a~vk 1
for (i = l; i <= mid; i++) { w aDJ
temp = data; x6|QTO
} "||G`%aO+t
for (j = 1; j <= r - mid; j++) { ,qhv(
temp[r - j + 1] = data[j + mid]; &<C&(g{Z
} *Oy%($'
int a = temp[l]; \BSPv]d
int b = temp[r]; dw7h@9\y
for (i = l, j = r, k = l; k <= r; k++) { ?\a';@h
if (a < b) { mPi{:
data[k] = temp[i++]; %5<t3H"
a = temp; ?QzN\fY;
} else { GU)NZ[e
data[k] = temp[j--]; q,j` _ R4
b = temp[j]; VF9-&HuC
} o4&#,m+:
} &MP8.(u `
} DzY`O@D[
Oin:5K)4-
/** McU]U9:z
* @param data |CjdmQ u
* @param l w"j[c#vM
* @param i J_XbtCmt
*/ R=HcSRTkA
private void insertSort(int[] data, int start, int len) { GZ"J6/0-|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N,`<:'
} >@^j9{\
} i(<do "Am<
} 71Mk!E=1
} \"A~ks~
BP@Lhii
堆排序： =[^_x+x hE
fehM{)x2:
package org.rut.util.algorithm.support; p"J\+R
LpSd/_^b
import org.rut.util.algorithm.SortUtil; j'FBt8P'
HoKN<w
/** oJEjg>%n
* @author treeroot e@{8G^o>D
* @since 2006-2-2 lD)QB!*v
* @version 1.0 '=m ?l
*/ *AN2&>Y
public class HeapSort implements SortUtil.Sort{ ^2um.`8
affig
/* (non-Javadoc) JxLD}$I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q oVp@=\:"
*/ 81U(*6
public void sort(int[] data) { }!RFX)T
MaxHeap h=new MaxHeap(); i6h , Aw3
h.init(data); >=Un=Q%
for(int i=0;i h.remove(); _&6&sp<n
System.arraycopy(h.queue,1,data,0,data.length); fj])
} D'+kzb@
0sKY;(
private static class MaxHeap{ -|xyj2M
N{6Lvq[8
void init(int[] data){ t6O/Q0_
this.queue=new int[data.length+1]; uia-w^F e
for(int i=0;i queue[++size]=data; ~*h` ?A0
fixUp(size); d.uJ}=|
} w0^T-O`<
} I- X|-
g4^df%)&
private int size=0; &U8W(NxN
YWPAc>uw,
private int[] queue; `$D2w|
9*}?0J8
public int get() { }x1*4+Y1
return queue[1]; ?Y#0Je
} nzHsyL
zy9# *gGq
public void remove() { !&D&Gs
SortUtil.swap(queue,1,size--); t`X-jr)g
fixDown(1); Pz1[ b$%
} 0@ 9em~
file://fixdown T6ajWUw
private void fixDown(int k) { )0JXUC e
int j; jz2W/EE`w
while ((j = k << 1) <= size) { ~Xg@,?Zr
if (j < size %26amp;%26amp; queue[j] j++; IU`&h2KZ.
if (queue[k]>queue[j]) file://不用交换 agFWye
break; ggUJ -M'2h
SortUtil.swap(queue,j,k); fhAK^@h
k = j; ~cSOni`
} 6A]Ia4PL
} QX'/PO
private void fixUp(int k) { Q1Sf7)
while (k > 1) { ?B2 T'}~
int j = k >> 1; CKv[E
if (queue[j]>queue[k]) =%YU~
break; 5h^U ]Y#
SortUtil.swap(queue,j,k); FU|c[u|z
k = j; FXPw5
} ~',<7eW
} nkp!kqJ09
X#mppMU
} 3!0Eh8ncI
4#Fz!Km
} v(\kSlJ
0FFx
SortUtil： X'Dg= |
Yq.Cz:>b
package org.rut.util.algorithm; j|&?BBa9
W,iSN}
import org.rut.util.algorithm.support.BubbleSort; $*bd})y)I
import org.rut.util.algorithm.support.HeapSort; R)"Y40nW
import org.rut.util.algorithm.support.ImprovedMergeSort; )x-iru A:
import org.rut.util.algorithm.support.ImprovedQuickSort; Wm nsD!
import org.rut.util.algorithm.support.InsertSort; (DCC4%w"
import org.rut.util.algorithm.support.MergeSort; +1H.5|
import org.rut.util.algorithm.support.QuickSort; =!'gV:M
import org.rut.util.algorithm.support.SelectionSort; YB h:
import org.rut.util.algorithm.support.ShellSort; #k1%}k=
O1Gd_wDC/i
/** w<<G}4~u|
* @author treeroot qh/q<
* @since 2006-2-2 t,;1?W#
* @version 1.0 =~% B}T
*/ 50oNN+;=R
public class SortUtil { jZcjiOX
public final static int INSERT = 1; 8W 9%NW3&
public final static int BUBBLE = 2; yG5T;O&
public final static int SELECTION = 3; cy)gN g
public final static int SHELL = 4; 6|m1z
public final static int QUICK = 5; N0h"EV[
public final static int IMPROVED_QUICK = 6; C26PQGo#$
public final static int MERGE = 7; n`T 4aDm
public final static int IMPROVED_MERGE = 8; W xyQA:3s
public final static int HEAP = 9; ik77i?Hg
AA9OElCa
public static void sort(int[] data) { `?PZvGi
sort(data, IMPROVED_QUICK); .}6 YKKqS
} }> k9]Y
private static String[] name={ >b#z o,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kDJ5x8Q#
}; 4w^B&e%
@6>R/]
private static Sort[] impl=new Sort[]{ \Nu(+G?e
new InsertSort(), MI|DOp
new BubbleSort(), G6xdGUM
new SelectionSort(), qtTys gv
new ShellSort(), p%CAicn
new QuickSort(), ~wIVw}
new ImprovedQuickSort(), ZGa>^k[:
new MergeSort(), O,ZvV3
new ImprovedMergeSort(), 0O?B!Jr]RM
new HeapSort() v8,+|+3
}; _r5Q%8J
w-R>gdm
public static String toString(int algorithm){ nbMnqkNb
return name[algorithm-1]; J[;c}
} A0yRA+
$BG4M?Y
public static void sort(int[] data, int algorithm) { ts3%cRN r
impl[algorithm-1].sort(data); l/`<iG%
} a<FzHCw
ZPn`.Qc
public static interface Sort { x`w 4LF
public void sort(int[] data); f.rz2)o
} *'vX:n&t
+O}6 8N
public static void swap(int[] data, int i, int j) { Ooz+V;#Q
int temp = data; 9k ]$MR
data = data[j]; qr$=oCqa
data[j] = temp; Z:09]r1
} m>$+sMZE
} 7_d gQI3y