[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; Qp3_f8
} q@8*Xa>
int i1=l; e(t\g^X
int i2=mid+1; `X&gE,Ii
for(int cur=l;cur<=r;cur++){ /a4{?? #e
if(i1==mid+1) XW]tnrs
data[cur]=temp[i2++]; 8{sGNCvU
else if(i2>r) -uf|w?
data[cur]=temp[i1++]; [7Oe3=
else if(temp[i1] data[cur]=temp[i1++]; UP,c|
else %7+qnH*;r
data[cur]=temp[i2++]; }o`76rDN
} HG^'I+Yn
} vXje^>_6
`b$.%S8uj=
} !+v$)3u9
2BwO!Y[
改进后的归并排序: SwMc pNo
|CRn c:
package org.rut.util.algorithm.support; *$g-:ILRuZ
uVrd i?3
import org.rut.util.algorithm.SortUtil; C~/a-
aPL+=58r
/** $=4QO
* @author treeroot W'M*nR|xo
* @since 2006-2-2 Ysv" 6b}
* @version 1.0 T6=u P)!K
*/ a&? :P1$
public class ImprovedMergeSort implements SortUtil.Sort { .$vK&k
7qS)c}Q\
private static final int THRESHOLD = 10; Y}wyw8g/
G4"F+%.
/* 5r^(P
* (non-Javadoc) Cw&KVw*
* H qx-;F~0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xJ.M;SF4
*/ utV_W&
public void sort(int[] data) { IH+|}z4N?>
int[] temp=new int[data.length]; UkFC~17P
mergeSort(data,temp,0,data.length-1); {)sdiE
} tKXIk9e
X"%gQ.1|{j
private void mergeSort(int[] data, int[] temp, int l, int r) { )9]PMA?u
int i, j, k; 1$h,m63)
int mid = (l + r) / 2; vnuN6M{
if (l == r) 5v*\Zr5ha
return; nX8v+:&}
if ((mid - l) >= THRESHOLD) c-sfg>0^
mergeSort(data, temp, l, mid); 5Gm_\kd
else c7H^$_^=
insertSort(data, l, mid - l + 1); }0y"F
if ((r - mid) > THRESHOLD) |`FY1NN
mergeSort(data, temp, mid + 1, r); KMax$
else t%8BK>AHvw
insertSort(data, mid + 1, r - mid); G 01ON0
S,8elKH4
for (i = l; i <= mid; i++) { p5*EA x
temp = data; =7UsVn#o
} J#83 0r(-
for (j = 1; j <= r - mid; j++) { 1< ?4\?j
temp[r - j + 1] = data[j + mid]; 3Jn;}
} 8LCb+^
int a = temp[l]; #GFr`o0$^
int b = temp[r]; n `Ac 3A
for (i = l, j = r, k = l; k <= r; k++) { P.DK0VgY
if (a < b) { uPvEwq* C
data[k] = temp[i++]; /yZcDK4
a = temp; 7zj{wp!
} else { 'Pbr v
data[k] = temp[j--]; eyxW 0}[
b = temp[j]; BTxrp
} 19#\+LWA
} -Lg Ei3m
} s>c=c-SP.
B#R|*g:x
/** |uJ%5y#
* @param data ;9#KeA _
* @param l '5tCz9}Y
* @param i vih9KBT
*/ Dt1jW
private void insertSort(int[] data, int start, int len) { L"aeG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8FhdN
} !5N.B|Nt
} s#GLJl\E_P
} 'N(R_q6MW
} (h `V+
;FEqe49
堆排序： +cRn%ioVi
!'O@2{?B
package org.rut.util.algorithm.support; qxj(p o
"Y.y:Vv;
import org.rut.util.algorithm.SortUtil; )M^ gT}M
k;W XB|k
/** |l!aB(NW
* @author treeroot P2nu;I_&
* @since 2006-2-2 -n;}n:wL
* @version 1.0 AOx[
*/ yh=N@Z*zP
public class HeapSort implements SortUtil.Sort{ cc34e
@%SQFu@FJ
/* (non-Javadoc) 6H|S;K+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wKHBAW[i]
*/ `$NP>%J-
public void sort(int[] data) { `y0FY&y=
MaxHeap h=new MaxHeap(); #LCb
h.init(data); hv+zGID7
for(int i=0;i h.remove(); nRY5xRvK
System.arraycopy(h.queue,1,data,0,data.length); MO]&bHH7;
} DTs;{c
[S<";l8
private static class MaxHeap{ D`AsRd
GKCroyor
void init(int[] data){ %>s|j'{
this.queue=new int[data.length+1]; {XHh8_^&
for(int i=0;i queue[++size]=data; ^C%<l(b
fixUp(size); B-ESFATc
} J8~haim
} ~{gqsuCCL
/7LR;>Bj
private int size=0; J^/p(
z$Qbj
private int[] queue; F5#YOck&,
"h ^Z
public int get() { F&Hrk|a
return queue[1]; RT5T1K08I
} 3N:D6w-R
h.fq,em+H
public void remove() { RGX=)
SortUtil.swap(queue,1,size--); \C1nZk?3
fixDown(1); $7uA%|\
} %K QQ,{ b
file://fixdown [8*)8jP3
private void fixDown(int k) { RFH0
int j; V1JIht>Opo
while ((j = k << 1) <= size) { ]:\dPw`A
if (j < size %26amp;%26amp; queue[j] j++; uwBiW
if (queue[k]>queue[j]) file://不用交换 a'z7(8$$
break; ]+$?u&0?w
SortUtil.swap(queue,j,k); Y4(
k = j; ,?XCyHSgWW
} 7[wieYj{
} m#F`] {
private void fixUp(int k) { k$7Jj-+~
while (k > 1) { O| hpXkV
int j = k >> 1; A+)`ZTuO
if (queue[j]>queue[k]) uM'Jp?
break; qyNyBr?
SortUtil.swap(queue,j,k); as_PoCoss
k = j; +2j AC r
} }iuw5dik+
} kSh( u
b%5f&N
} = 9]~yt
#C3.Jef
} JO<wU
xZv#Es%#
SortUtil： n.G!43@*N
}Z,x~G
package org.rut.util.algorithm; #Vha7
W{gb:^;zb
import org.rut.util.algorithm.support.BubbleSort; _f:W?$\ho
import org.rut.util.algorithm.support.HeapSort; >oe]$r
import org.rut.util.algorithm.support.ImprovedMergeSort; !I Qck8Y
import org.rut.util.algorithm.support.ImprovedQuickSort; ][h}
import org.rut.util.algorithm.support.InsertSort; e@OX_t_
import org.rut.util.algorithm.support.MergeSort; w*JGUk
import org.rut.util.algorithm.support.QuickSort; d;}nh2*
import org.rut.util.algorithm.support.SelectionSort; NTI+
import org.rut.util.algorithm.support.ShellSort; N'`A?&2ru
>&5DsV.B
/** 1PV'?tXp(
* @author treeroot <yFu*(Q
* @since 2006-2-2 'CkIz"Wd
* @version 1.0 .xWC{}7[
*/ ';=O 0)u
public class SortUtil { ?m?::RH
public final static int INSERT = 1; ={wcfhUl+
public final static int BUBBLE = 2; "~C,bk
public final static int SELECTION = 3; V /V9B2.$
public final static int SHELL = 4; O+Y6N
public final static int QUICK = 5; o$lM$E:
public final static int IMPROVED_QUICK = 6; &@Be2!%'9K
public final static int MERGE = 7; 8C9-_Ng`
public final static int IMPROVED_MERGE = 8; "mvt>X
public final static int HEAP = 9; D\NKC@(M
Hn+~5@.
public static void sort(int[] data) { 8&`LYdzt
sort(data, IMPROVED_QUICK); zsyIV!(
} XLOh7(
private static String[] name={ Q:k}Jl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DwE[D]7o
}; iVq'r4S
.MoU1n{Yc
private static Sort[] impl=new Sort[]{ R3&Iu=g
new InsertSort(), D (?DW}Rqs
new BubbleSort(), T&u5ki4NE
new SelectionSort(), V7fq4O^:
new ShellSort(), 8(&[Rs?K
new QuickSort(), 70tH:Z)"
new ImprovedQuickSort(), G.abql
new MergeSort(), My[pr_xg
new ImprovedMergeSort(), ++Ts
new HeapSort() ZyPVy
}; EGU 0)<
=BAW[%1b
public static String toString(int algorithm){ Tc`=f'pP)4
return name[algorithm-1]; jc[Y}gd,
} k(7&N0V%zz
'RYIW/a
public static void sort(int[] data, int algorithm) { {~"/Y@&]R
impl[algorithm-1].sort(data); n QZwC
} }1i`6`y1
A:N|\Mv2b
public static interface Sort { *>'V1b4}
public void sort(int[] data); <~'"<HwtK
} as4;:
q{I%Q)t)gU
public static void swap(int[] data, int i, int j) { {e9@-
int temp = data; +tIF h'
data = data[j]; 0c'<3@39k|
data[j] = temp; a /l)qB#
} z] PSpUd
} a85$K$b>