[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; 0]KraLu"N
} Amr[wx
int i1=l; T{wpJ"F5<]
int i2=mid+1; n~"$^Vr
for(int cur=l;cur<=r;cur++){ <?-YTY|
if(i1==mid+1) w{[=l6L m
data[cur]=temp[i2++]; 4%4avEa"w
else if(i2>r) 2]GdD*
data[cur]=temp[i1++]; 1_fZm+oW!
else if(temp[i1] data[cur]=temp[i1++]; ;{i'#rn{
else 0nn okN^
data[cur]=temp[i2++]; mpAR7AG6
} W>r#RXmh
} ?]fF3SJk
2XTPBZNe
} qPB8O1fyU
tO7v4
改进后的归并排序: LTNj| u
3!Sp0P
package org.rut.util.algorithm.support; :q8b;*:
3czeTj
import org.rut.util.algorithm.SortUtil; [U}+sTQ
[Vd[-
/** *Do/+[Ae
* @author treeroot ;Op3?_
* @since 2006-2-2 +4[^!q* H
* @version 1.0 s2?T5oWU
*/ Q~R ~xz
public class ImprovedMergeSort implements SortUtil.Sort { Q9I j\HbA"
WLF0US'
private static final int THRESHOLD = 10; 8^Hn"v
}I3gU
/* G+B~Ix-
* (non-Javadoc) M02uO`Y9
* 4S~o-`&W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .s#;s'>g
*/ ^~{$wVGa
public void sort(int[] data) { \V9Z#>
int[] temp=new int[data.length]; -.g|l\
mergeSort(data,temp,0,data.length-1); NCxqh<
} RoCfJ65
hN['7:bQ
private void mergeSort(int[] data, int[] temp, int l, int r) { R@Gq)P9?
int i, j, k; &] \X]p
int mid = (l + r) / 2; u0P)7~%
if (l == r) .sQ=;w/ZA
return; R[49(>7H4
if ((mid - l) >= THRESHOLD) d,8mY/S>w
mergeSort(data, temp, l, mid); e[sK@jX6
else |F9z,cc"
insertSort(data, l, mid - l + 1); v9Xp97J2
if ((r - mid) > THRESHOLD) \Mg`(,kwe
mergeSort(data, temp, mid + 1, r); ;'81jbh
else f|y:vpd%
insertSort(data, mid + 1, r - mid); J=pztASt
i)#s.6.D>
for (i = l; i <= mid; i++) { LL|7rS|o
temp = data; ,J`'Y+7W
} )c l5B{1P
for (j = 1; j <= r - mid; j++) { Zy|Mz&
temp[r - j + 1] = data[j + mid]; sp@E8G%xO
} ,K:ll4{b
int a = temp[l]; #gm)dRKm%
int b = temp[r]; kId n6 Wx,
for (i = l, j = r, k = l; k <= r; k++) { A AHt218
if (a < b) { .uNQBBNv
data[k] = temp[i++]; G_>#Js
a = temp; _+ .\@{c
} else { o)OUWGjb/K
data[k] = temp[j--]; hJzxbr <
b = temp[j]; 3!5Ur&
} _fZZ_0\Q
} Oy 2+b1{
} bT 2a40ul
FQ>`{%>
/** bzdb|I6Z
* @param data 0i8LWX_M
* @param l ^ wY[3"{
* @param i }K8/-d6
*/ wvrrMGU)a
private void insertSort(int[] data, int start, int len) { 7\ nf:.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9CCkqB/
} )5|I_PXB
} ='TE,et@d
} 6sa"O89
} 1heS*Fwn'
"B_K XL
堆排序： K\vSB~{[
['%69dPh
package org.rut.util.algorithm.support; xoOJauSX1
-Ij&
import org.rut.util.algorithm.SortUtil; rHP%0f9:
&-5_f*{
/** _-5,zPR
* @author treeroot rp5(pV7*
* @since 2006-2-2 BUwONF
* @version 1.0 PQ@L+],C
*/ kNqH zo
public class HeapSort implements SortUtil.Sort{ [o*7FEM|<
4mn&4e
/* (non-Javadoc) y>*xVK{D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S$2b>#@UJ
*/ K(XN-D/c
public void sort(int[] data) { 8u!"#S#>a
MaxHeap h=new MaxHeap(); &YDK (&>
h.init(data); JsO *1{6g
for(int i=0;i h.remove(); "bDs2E+W
System.arraycopy(h.queue,1,data,0,data.length); d&#~h:~
} >a3p >2
V5U?F6
private static class MaxHeap{ %%cHoprDa
={hX}"*D
void init(int[] data){ JoSJH35=:
this.queue=new int[data.length+1]; OLI$1d_
for(int i=0;i queue[++size]=data; eHDef
fixUp(size); ^Q&u0;OJ
} [b:e:P 2
} :8A!HI}m{
~q&pF"va8
private int size=0; .'a&33J
)]#aauC+
private int[] queue; Z@Ae$ '9H
5XLs}:
public int get() { nk3y"ne7
return queue[1]; *Sh^J+j
} xG;-bJu
D/h/Y) Y
public void remove() { Jjl`_X$CB
SortUtil.swap(queue,1,size--); )Fb>8<%
fixDown(1); 4[r/}/iGo
} fr!Pj(Q1
file://fixdown Py{<bd
private void fixDown(int k) { U\rh[0
int j; y,pZTlE
while ((j = k << 1) <= size) { N?X~w <
if (j < size %26amp;%26amp; queue[j] j++; |pa$*/!NT
if (queue[k]>queue[j]) file://不用交换 uytE^
break; Et_V,s<|
SortUtil.swap(queue,j,k); 0|; .6\
k = j; K!,<7[MBg
} U?.9D
} ^fz+41lE\
private void fixUp(int k) { @|'5n
while (k > 1) { wW>)(&!F
int j = k >> 1; w\}?(uO
if (queue[j]>queue[k]) >[6{LAe~hp
break; ?bw4~
SortUtil.swap(queue,j,k); KR"M/#
k = j; ~H6r.:]
} _4cvX
} <_(/X,kBK
c)0amM
} $wYFEz
>hH0Q5aL
} ,ZS6jZ
!a$ D4(`v
SortUtil： mXUYQ82
-Z-IF#%
package org.rut.util.algorithm; B^%1Rpcn
l]<L [Y,E-
import org.rut.util.algorithm.support.BubbleSort; moVbw`T
import org.rut.util.algorithm.support.HeapSort; 81*M= ?
import org.rut.util.algorithm.support.ImprovedMergeSort; ~SvC[+t+U
import org.rut.util.algorithm.support.ImprovedQuickSort; 5Zw1y@k(
import org.rut.util.algorithm.support.InsertSort; }KhjlPhx
import org.rut.util.algorithm.support.MergeSort; -uh(?])H
import org.rut.util.algorithm.support.QuickSort; OIl#DV.
import org.rut.util.algorithm.support.SelectionSort; ;+1RUv
import org.rut.util.algorithm.support.ShellSort; jgS%1/&
c]B$i*t
/** !`bio cA
* @author treeroot ,7XtH>2s
* @since 2006-2-2 SR*wvQnOx
* @version 1.0 ?|e'Gbb_
*/ (Z5##dS3
public class SortUtil { @E.k/G!~Nb
public final static int INSERT = 1; 1 y}2+Kk
public final static int BUBBLE = 2; Z!0]/mCE8
public final static int SELECTION = 3; "7>>I D
public final static int SHELL = 4; ET];%~ ^
public final static int QUICK = 5; &uUo3qXQ5l
public final static int IMPROVED_QUICK = 6; >yJ9U,Y
public final static int MERGE = 7; dz>;<&2Z
public final static int IMPROVED_MERGE = 8; a}SdW
public final static int HEAP = 9; PA w-6;
`"@X.}\
public static void sort(int[] data) { m`6Yc:@E
sort(data, IMPROVED_QUICK); W(RF n`g\
} Xtq{%
private static String[] name={ ?X?&~3iD%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (6v(9p
}; Yl;^ k0ZI
(Toq^+`c
private static Sort[] impl=new Sort[]{ e"r)R8
new InsertSort(), `]Bxn)b(
new BubbleSort(), D|qk_2R%
new SelectionSort(), Z`3ufXPNlO
new ShellSort(), 1{_A:<VBl
new QuickSort(), HyiFy7j
new ImprovedQuickSort(), .}')f;jH5<
new MergeSort(), !se0F.K
new ImprovedMergeSort(), W0jZOP5_.$
new HeapSort() 7kKy\W
}; L}#0I+Ml7
0N=X74
public static String toString(int algorithm){ Nx#4W1B[`H
return name[algorithm-1]; YC]L)eafo`
} H;aYiy
N)% ;jh:T
public static void sort(int[] data, int algorithm) { yk2!8
impl[algorithm-1].sort(data); 97!>%d[0
} z'p:gv]
Da$r`
public static interface Sort { g/UaYCjM
public void sort(int[] data); Y,8KPg@W
} P\CDd=yWc
)Z+{|^`kJ
public static void swap(int[] data, int i, int j) { 2}?wYI*:5|
int temp = data; l:]Nn%U(>
data = data[j]; QH]M
data[j] = temp; .ut{,(5
} 6I_Hd>4
} ^BZkHAp