[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; eV"Uv3
} ]1MZ:]k
int i1=l; ((M>To_l
int i2=mid+1; MjK<n[.
for(int cur=l;cur<=r;cur++){ M^G9t*I
if(i1==mid+1) U|8?$/*\
data[cur]=temp[i2++]; \y+^r|IL
else if(i2>r) .vd*~U"
data[cur]=temp[i1++]; >O0<u
else if(temp[i1] data[cur]=temp[i1++]; )|W6Z
else PJ,G_+b!
data[cur]=temp[i2++]; y2R\SL,
} +W8kMuM!
} )S}.QrG
)~IOsTjI
} ft~QVe!
EAE#AB-A
改进后的归并排序: u/xP$
"G Jhx/zt
package org.rut.util.algorithm.support; ?QtM|e
/JIVp_-p
import org.rut.util.algorithm.SortUtil; 7^1K4%IPl
=%|f-x
/** t{`uN
* @author treeroot |W*2L]&
* @since 2006-2-2 g[;&_gL
* @version 1.0 yM7FR);
*/ m8INgzVTC
public class ImprovedMergeSort implements SortUtil.Sort { w:](F^<s,
XW+-E^d
private static final int THRESHOLD = 10; U !%IC7@
NOf{Xx<#k
/* \w-3Spk*
* (non-Javadoc) `%~f5<
* rddn"~lm1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h7S; 4]
*/ w9Nk8OsL
public void sort(int[] data) { hMgk+4*
int[] temp=new int[data.length]; ^;$9>yi1
mergeSort(data,temp,0,data.length-1); D'Uc?2X,&
} [q^pMH#U"
2#8PM-3"
private void mergeSort(int[] data, int[] temp, int l, int r) { (l/i#
int i, j, k; ~/Y8wxg
int mid = (l + r) / 2; 4$4Tx9C
if (l == r) Xd.y or
return; >b~Q%{1
if ((mid - l) >= THRESHOLD) U^-RyE!}
mergeSort(data, temp, l, mid); w1 A-_
else 8jiBLZkRf
insertSort(data, l, mid - l + 1); Djf~8q V!
if ((r - mid) > THRESHOLD) |1Nz8Vr.
mergeSort(data, temp, mid + 1, r); $U2Jq@G*
else #nKGU"$+
insertSort(data, mid + 1, r - mid); z;>O5a>z
s}DNu<"g
for (i = l; i <= mid; i++) { [3qJUJM
temp = data; ^plP1c:
} |r4&@)
for (j = 1; j <= r - mid; j++) { Ey_mK\'
temp[r - j + 1] = data[j + mid]; \;+b1
} YP{mzGdE&
int a = temp[l]; Rb <{o8
int b = temp[r]; u@zT~\ h*
for (i = l, j = r, k = l; k <= r; k++) { - @KT#
if (a < b) { 2O2d*Ld>
data[k] = temp[i++]; wD@ wOC
a = temp; D~TK'&
} else { t'C9;
data[k] = temp[j--]; 7f~7vydZ}
b = temp[j]; 0b2;
} 5=!aq\ 5
} !V/p.O
} [U7r>&
3W3d $
/** l_(4CimOZ
* @param data =.9tRq
* @param l 8)J,jh9q
* @param i M|>-q
*/ /jOug>s
private void insertSort(int[] data, int start, int len) { *Oy%($'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JZ-M<rcC
} a0 w
} 6<UI%X
} >JN[5aus
} jF5oc
~ o5h}OU"
堆排序： ;giT[KK
,Lw '3
package org.rut.util.algorithm.support; Zr;(a;QKs
zrur-i$N+
import org.rut.util.algorithm.SortUtil; }$s._)a
8SMa5a{
/** 0y#TGM|0D
* @author treeroot 6r)qM)97
* @since 2006-2-2 f&Meiu+
* @version 1.0 1)M%]I4
*/ N,`<:'
public class HeapSort implements SortUtil.Sort{ !q*]_1
=v=H{*dWA
/* (non-Javadoc) [kZe6gYP&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eadY(-4|I-
*/ 79MB_Is]s
public void sort(int[] data) { %MN>b[z
MaxHeap h=new MaxHeap(); 9{{CNy p
h.init(data); rjT!S1Hs
for(int i=0;i h.remove(); [2ZZPY9?Q
System.arraycopy(h.queue,1,data,0,data.length); 26c1Yl,DMn
} -ID!kZx
*:V"C\`^n
private static class MaxHeap{ &k {1N.
*AN2&>Y
void init(int[] data){ orAEVEm
this.queue=new int[data.length+1]; ;+]GyDgVq
for(int i=0;i queue[++size]=data; \o,`@2H+'
fixUp(size); M7n|Z{?(
} Nv_"?er+y
} i6h , Aw3
$+ ?A[{JG
private int size=0; 'B4j=K*
m/W)IG>
private int[] queue; DvvjIYB~
Z"G@I= Q(
public int get() { t5pf4M7
return queue[1]; t6O/Q0_
} w`Js"_\
R%N&Y~zH
public void remove() { ``mW\=fe
SortUtil.swap(queue,1,size--); ,~- dZs
fixDown(1); 8z,|N#
} NbnuQPb'
file://fixdown -kd_gbnr3
private void fixDown(int k) { ~;0J4hR
int j; u9"1%
while ((j = k << 1) <= size) { }$|uIS
if (j < size %26amp;%26amp; queue[j] j++; CCZ]`*wJ
if (queue[k]>queue[j]) file://不用交换 rTjV/~
break; _S;L|1>S
SortUtil.swap(queue,j,k); <w d+cPZQr
k = j; YS5Pt)?
} g^DPbpWxu
} 85 tQHm6j
private void fixUp(int k) { dF%sD|<)
while (k > 1) { skn`Q>a
int j = k >> 1; w;(`!^xv
if (queue[j]>queue[k]) TY3WP$u
break; )Aky:kM$
SortUtil.swap(queue,j,k); 8j}CP
k = j; 6 2r%q^r`i
} W=Ru?sG=
} T)ra>r<#
Y&k6Xhuao
} 8*^Q#;^~99
"$tP>PO{<
} FU|c[u|z
-$4#eG%3
SortUtil： ~',<7eW
Fss7xP'
package org.rut.util.algorithm; gekW&tRie
yU~OfwQ
import org.rut.util.algorithm.support.BubbleSort; $!<J_d*
import org.rut.util.algorithm.support.HeapSort; <=*xwI&q
import org.rut.util.algorithm.support.ImprovedMergeSort; KF|<A@V
import org.rut.util.algorithm.support.ImprovedQuickSort; 2rq)U+
import org.rut.util.algorithm.support.InsertSort; [*O#6Xu
import org.rut.util.algorithm.support.MergeSort; j|&?BBa9
import org.rut.util.algorithm.support.QuickSort; eXI^9uH
import org.rut.util.algorithm.support.SelectionSort; eGS1% [
import org.rut.util.algorithm.support.ShellSort; >uuP@j
hgCeU+H
/** ;9pOtr
* @author treeroot U<**Est
* @since 2006-2-2 =!'gV:M
* @version 1.0 dIG(7~
*/ Oc;0*v[I
public class SortUtil { gg(^:`+
public final static int INSERT = 1; y_$=Pu6H
public final static int BUBBLE = 2; sY=fS2b#)
public final static int SELECTION = 3; zlmb_akJ
public final static int SHELL = 4; ANy=f-V
public final static int QUICK = 5; >8~+[e
public final static int IMPROVED_QUICK = 6; 8W 9%NW3&
public final static int MERGE = 7; !Jw
public final static int IMPROVED_MERGE = 8; sAIL+O
public final static int HEAP = 9; W;coi4
^IuHc_
public static void sort(int[] data) { xQC.ap
sort(data, IMPROVED_QUICK); 2jf-vWV_
} 1%|+yu1
private static String[] name={ AA9OElCa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z'PE^ ,
}; }'dnL
DNdwMSwp
private static Sort[] impl=new Sort[]{ SI3ek9|XU
new InsertSort(), nJny9g
new BubbleSort(), @6>R/]
new SelectionSort(), :cop0;X:Wm
new ShellSort(), m,v"N%k,
new QuickSort(), ]`&EB~K&NY
new ImprovedQuickSort(), `,4"[6S
new MergeSort(), $!Z6?+
new ImprovedMergeSort(), B2%)G$B
new HeapSort() 0O?B!Jr]RM
}; LWc}j`Wd
WS@b3zzN
public static String toString(int algorithm){ d:O>--$_tw
return name[algorithm-1]; '5KgRK"
} /] ce?PPC
vV-ATIf ^
public static void sort(int[] data, int algorithm) { Z$Ynar
impl[algorithm-1].sort(data); h{S';/=8
} umYq56dw
x`w 4LF
public static interface Sort { ;Aiuy{<
public void sort(int[] data); 1agyT
} Q2PY( #
9]BpP0f\
public static void swap(int[] data, int i, int j) { QP)-O*+AA
int temp = data; RG[3LX/
data = data[j]; BV$lMLD{r
data[j] = temp; g/W<;o<v(I
} <P ~+H>;
} {*As-Y:'F