[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; K-&V,MI
} A>{p2?`+!
int i1=l; F4Y@ B
int i2=mid+1; *m2=/Sh
for(int cur=l;cur<=r;cur++){ 0euuT@_$
if(i1==mid+1) d&#~h:~
data[cur]=temp[i2++]; 2< hAa9y
else if(i2>r) IF]lHB
data[cur]=temp[i1++]; ?8W("W
else if(temp[i1] data[cur]=temp[i1++]; g@\fZTO
else waKT{5k
data[cur]=temp[i2++]; KRjV}\}
} 4nAa`(62
} QM?#{%31
^( Rvk
} t'm;:J1
c*UvYzDZL
改进后的归并排序: r=c<--_@
|AC1\)2tT
package org.rut.util.algorithm.support; #[#KL/i)$
fr!Pj(Q1
import org.rut.util.algorithm.SortUtil; w>b-} t
y,pZTlE
/** }-~T<egF
* @author treeroot )*c>|7G
* @since 2006-2-2 "`asFg
* @version 1.0 ![f ![l
*/ I7^zU3]Ul
public class ImprovedMergeSort implements SortUtil.Sort { xAggn
t20PP4FWM
private static final int THRESHOLD = 10; n<B<93f/
hVUP4 A
/* 1n\ t+F
* (non-Javadoc) } G<rt
* \ u_ui
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OxGE%R,
*/ W[+|}
public void sort(int[] data) { f3|@|' ;
int[] temp=new int[data.length]; ?uMQP NYs
mergeSort(data,temp,0,data.length-1); -R>}u'EG>
} (RtueEb.~E
y$<Vha
private void mergeSort(int[] data, int[] temp, int l, int r) { Y wkyq>Rv
int i, j, k; _bD/D!|
int mid = (l + r) / 2; yz2Ci0Dwy
if (l == r) E\m5%bK\B
return; exdx\@72
if ((mid - l) >= THRESHOLD) Vb qto|X@
mergeSort(data, temp, l, mid); <)*2LBF@]
else *._|-L
insertSort(data, l, mid - l + 1); rxO2QQ%V
if ((r - mid) > THRESHOLD) |y<),j6
mergeSort(data, temp, mid + 1, r); )etmE
else f&D]anf33
insertSort(data, mid + 1, r - mid); tRpEF2
~XeFOMq
for (i = l; i <= mid; i++) { 'B0{U4?
temp = data; RllY-JBO
} 1009ES7*
for (j = 1; j <= r - mid; j++) { y0~Ia:y
temp[r - j + 1] = data[j + mid]; a^5^gId5l!
} g]UBZ33y
int a = temp[l]; d*pF>j
int b = temp[r]; a{Esw`
for (i = l, j = r, k = l; k <= r; k++) { Z`3ufXPNlO
if (a < b) { ~el3I=KC}
data[k] = temp[i++]; [Pe#kzLX
a = temp; )EyI0R]5
} else { 2FD=lR?6
data[k] = temp[j--]; kqG0%WtQ
b = temp[j]; 8vk..!7n}
} H;aYiy
} }6 5s'JB
} 97!>%d[0
:ug4g6;#H0
/** ]\RRqLDzkg
* @param data FI8Oz,
* @param l A~nf#(!^]
* @param i \8OO)98'
*/ UueD(T;p
private void insertSort(int[] data, int start, int len) { p#f+P?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j<%])
} 4;`Bj:.
} /9yaW7w
} C}IbxKl
} iAMtejw
}_QKJw6/"
堆排序： H(0q6~|
1G~S|,8p
package org.rut.util.algorithm.support; !A8^Xmz"
:PbDU$x
import org.rut.util.algorithm.SortUtil; Rd+P,PO
&@"]+33
/** mxSKG> O
* @author treeroot 1gO2C$
* @since 2006-2-2 H]<]^Zmjy
* @version 1.0 y?[snrK G
*/ uQLlA&I"
public class HeapSort implements SortUtil.Sort{ &K^MNd
7=4A;Ybq
/* (non-Javadoc) YEjY8]t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P];JKE%
*/ 7dh1W@\
public void sort(int[] data) { o?Sla_D
MaxHeap h=new MaxHeap(); TY;U2.Ud
h.init(data); u"$a>S_
for(int i=0;i h.remove(); I.}1JJF*
System.arraycopy(h.queue,1,data,0,data.length); 47 u@4"M
} 2>S~I"o0
zvv:dC/p<
private static class MaxHeap{ BH0!6Oq
UkR3}{i
void init(int[] data){ *.y'(tj[
this.queue=new int[data.length+1]; #:3r4J%+~
for(int i=0;i queue[++size]=data; J."{<&
fixUp(size); d&:H&o)T!
} Wf02$c0#K
} w#PZu+
[UPNd!sy
private int size=0; 2]jPv0u
x;$|#]+
private int[] queue; `rWB`q|i<
V*B0lI7`B
public int get() { vW.%[]
return queue[1]; PNF4>)
} RJJ1
[J\DB)V/
public void remove() { *)VAaGUX>
SortUtil.swap(queue,1,size--); Y4~vC[$x'
fixDown(1); vrcE]5(:s
} }6~)bLzI}
file://fixdown 5ouQQ)vA
private void fixDown(int k) { M|CrBJv+F
int j; <A~GW 'HB
while ((j = k << 1) <= size) { iV)ac\
if (j < size %26amp;%26amp; queue[j] j++; gn5% F5W
if (queue[k]>queue[j]) file://不用交换 +BB0wY
break; 5}<[[}(
SortUtil.swap(queue,j,k); \ZnN D1A
k = j; *m_93J
} nTZ> |R)
} ko[TDh$T5
private void fixUp(int k) { g5R,% 6
while (k > 1) { me./o(!?
int j = k >> 1; fcAIg(vW
if (queue[j]>queue[k]) vj3isI4lU
break; M'u=H
SortUtil.swap(queue,j,k); ?vu|o'$T,
k = j; )1_(>|@oi
} ,+-?Zv 2
} Pf8u/?/
]bfqcmh<
} Qq0O0U
V<-htV
} lwsbm D
]C)|+`XE@
SortUtil： <|JU(B
#{>uC&jD
package org.rut.util.algorithm; + zDc
)VY10R)$
import org.rut.util.algorithm.support.BubbleSort; 6F ;Or
import org.rut.util.algorithm.support.HeapSort; 7)PJ:4IqS
import org.rut.util.algorithm.support.ImprovedMergeSort; 6K//1U$
import org.rut.util.algorithm.support.ImprovedQuickSort; Qu}N:P9l?X
import org.rut.util.algorithm.support.InsertSort; Qtnv#9%Vi
import org.rut.util.algorithm.support.MergeSort; $nFAu}%C
import org.rut.util.algorithm.support.QuickSort; U?EG6t
import org.rut.util.algorithm.support.SelectionSort; I7bi@t
import org.rut.util.algorithm.support.ShellSort; S>EDL
.D3`'K3t{[
/** 96)v#B?p
* @author treeroot 28+HKbgK
* @since 2006-2-2 ~y@& }
* @version 1.0 -R74/GBg
*/ !=knppY
public class SortUtil { t[j9R#02?
public final static int INSERT = 1; ~,G]glu8
public final static int BUBBLE = 2; <)J55++
public final static int SELECTION = 3; }+JLn%H)
public final static int SHELL = 4; ]gHLcr3
public final static int QUICK = 5; `OLB';D
public final static int IMPROVED_QUICK = 6; "MTq{f2?
public final static int MERGE = 7; wKLN:aRF2
public final static int IMPROVED_MERGE = 8; 43F^J%G
public final static int HEAP = 9; 7H?!RYrx
No~6s.H
public static void sort(int[] data) { T"B8;|
sort(data, IMPROVED_QUICK); i2U/RXu
} Y}ky/?q
private static String[] name={ -rRz@Cr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _UaPwJ
}; W7T"d4
xT/9kM&}L
private static Sort[] impl=new Sort[]{ |/t K-c6J
new InsertSort(), b2W;|
new BubbleSort(), Qv74?B@
new SelectionSort(), ~"\P~cg0J
new ShellSort(), o=@ UXi
new QuickSort(), . *Z#cq0
new ImprovedQuickSort(), 6XZN>#
new MergeSort(), + p'\(Z(
new ImprovedMergeSort(), HK?Foo?
new HeapSort() ?SB5b,
}; 75PS^5T,
9/^d~ZO
public static String toString(int algorithm){ lej^gxj/2
return name[algorithm-1]; vDWr|M%``l
} ^=3 ^HQ'Zm
\:C%> .VG
public static void sort(int[] data, int algorithm) { $F<%Jl7_Z
impl[algorithm-1].sort(data); E=3#TBd
} /^NJ)9IB
YALyZ.d
public static interface Sort { *?s/Ho &'
public void sort(int[] data); D_zcOq9
} 5BZ+b_A>VV
3KR2TcT#{
public static void swap(int[] data, int i, int j) { N" 8*FiZ|
int temp = data; n&3iz05}
data = data[j]; -<H ri5
data[j] = temp; ]Pz|Oi+]
} @<0h"i x
} 8a_ UxB