[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; @HQ`~C#Z'
} 9bP^`\K[N
int i1=l; W"zab
int i2=mid+1; lV`Q{bd+
for(int cur=l;cur<=r;cur++){ *i]=f6G
if(i1==mid+1) RMK"o?
data[cur]=temp[i2++]; ,u!*2cWN
else if(i2>r) s}j{#xT
data[cur]=temp[i1++]; uZc`jNc\
else if(temp[i1] data[cur]=temp[i1++]; )\_:{c
else _jJPbKz
data[cur]=temp[i2++]; yOphx07 (
} *FC=X)_&W
} eAXc:222
_&N2'hG=sn
} |K6REkzr
4#ug]X4Y')
改进后的归并排序: |zR8rqBX;
8dZ0rPd?
package org.rut.util.algorithm.support; crqpV F]1]
p;._HJ(
import org.rut.util.algorithm.SortUtil; _z'u pb&
{p;zuCF1
/** lp<g\
* @author treeroot JQ,1D`?.a
* @since 2006-2-2 LJ*q1 ;<E
* @version 1.0 9{-EJ)
*/ "]z-: \ V
public class ImprovedMergeSort implements SortUtil.Sort { Q7R~{5r>W
l%?T2Fm3>
private static final int THRESHOLD = 10; .#1~Rz1r
5"HVBfFk
/* ]<H&+ &!
* (non-Javadoc) y9_K, g
* ?%`@ub$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hvA^n@nr
*/ -sw .
public void sort(int[] data) { hJDi7P
int[] temp=new int[data.length]; c%&:6QniZ
mergeSort(data,temp,0,data.length-1); : y5<go8e
} zY,r9<I8_x
>c9a0A
private void mergeSort(int[] data, int[] temp, int l, int r) { NbC@z9Q
int i, j, k; @$LWWTr;
int mid = (l + r) / 2; |_`E1Y}}
if (l == r) sYjpU
return; e '2F#
if ((mid - l) >= THRESHOLD) 2'_:S@
mergeSort(data, temp, l, mid); qjf[zF
else #;%JT
insertSort(data, l, mid - l + 1); Au4yBm u
if ((r - mid) > THRESHOLD) 7Garnd b
mergeSort(data, temp, mid + 1, r); I9:Cb)hbU]
else }z\_;\7
insertSort(data, mid + 1, r - mid); wQwQXNG
|g #K]v
for (i = l; i <= mid; i++) { y($%;l
temp = data; ^@qvl%j
} ?gJy3@D
for (j = 1; j <= r - mid; j++) { &4b&X0pU
temp[r - j + 1] = data[j + mid]; #a`a$A
} Aj2OkD
int a = temp[l]; B>GE9y5
int b = temp[r]; mnmP<<8C,
for (i = l, j = r, k = l; k <= r; k++) { >B2:kY F
if (a < b) { AwslWkd=
data[k] = temp[i++]; w:?oTuw
a = temp; z)9wXo#~
} else { L ]w/P|
data[k] = temp[j--]; =li|
b = temp[j]; #|*F1K
} 2Z3('?\z~
} c05%iv
} Q8DQlqHm
,4ei2`wV
/** nWMmna.5
* @param data |37 g ~
* @param l Hd,p!_
* @param i ]p;FZ4-T
*/ /Wy.>YC|
private void insertSort(int[] data, int start, int len) { Sp}tD<V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D<Zp!J1o
} :PtF+{N>
} l'\pk<V
} BQ @huns3
} h}]fnA
uPRQU+
堆排序： v>Mnl
NcP.;u;`
package org.rut.util.algorithm.support; 6%fKuMpK(
C&6IU8l\
import org.rut.util.algorithm.SortUtil; +QE^\a
m+#iR}*1L
/** .N*Pl(<[
* @author treeroot bd<m%OM""
* @since 2006-2-2 CYKr\DA
* @version 1.0 I(9R~q
*/ 8 O67
public class HeapSort implements SortUtil.Sort{ ?gwUwOV"
#'q<v"w
/* (non-Javadoc) l2&`J_"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RKPD4e>%
*/ wN2QK6Oc
public void sort(int[] data) { WyZL9K{?
MaxHeap h=new MaxHeap(); ,9P:Draxs`
h.init(data); &`fhEN
for(int i=0;i h.remove(); j~FD{%4N
System.arraycopy(h.queue,1,data,0,data.length); ?_v{| YI=
} [xT:]Pw}
l/Vo-#
private static class MaxHeap{ a&k_=/X&
E"L2&.
void init(int[] data){ UThB7(O,
this.queue=new int[data.length+1]; fPR$kch
for(int i=0;i queue[++size]=data; D)@YI.T
fixUp(size); ]IL;`>Gp
} ~`D|IWMDq
} (?H0+zws^
l9Q(xuhv
private int size=0; ?h0X,fl3
g/&T[FOr
private int[] queue; !sRngXCXk?
2QNNp:`6
public int get() { [j"9rO" +
return queue[1]; 7y`}PMn
} .)+hH y
|TE}`?y[g
public void remove() { 6O@J7P
SortUtil.swap(queue,1,size--); [lk'xzE
fixDown(1); @A+RVg*=
} !I\!;b
file://fixdown 720)VzT
private void fixDown(int k) { .@"q$\
int j; J|3E-p\o
while ((j = k << 1) <= size) { U;n*j3wT
if (j < size %26amp;%26amp; queue[j] j++; nkv(~ej(
if (queue[k]>queue[j]) file://不用交换 z`6fotL
break; $HG}[XD?
SortUtil.swap(queue,j,k); \j2;4O?`
k = j; cD4 kC>P*
} QW_agm
} Bk}><H
private void fixUp(int k) { 63!rUB!
while (k > 1) { 4 V1bLm
int j = k >> 1; kF;5L)o
if (queue[j]>queue[k]) \*\R1_+
break; !WkIi^T
SortUtil.swap(queue,j,k); Uu7dSU
k = j; zKFp5H1!%+
} 3jogD
} ]MtFf6&
lZ&]|*>
} ?4CNkk=v
D^U: ih
} 'O6]0l
j%V["?)
SortUtil： }<jb vCeK
Zs2-u^3&
package org.rut.util.algorithm; -S%x wJKM
h5kPn~
import org.rut.util.algorithm.support.BubbleSort; >\<*4J$PZ
import org.rut.util.algorithm.support.HeapSort; W/=|/-\]/
import org.rut.util.algorithm.support.ImprovedMergeSort; YYg)
import org.rut.util.algorithm.support.ImprovedQuickSort; ^")F7`PF
import org.rut.util.algorithm.support.InsertSort; @^ ik[9^H
import org.rut.util.algorithm.support.MergeSort; |DF9cd^
import org.rut.util.algorithm.support.QuickSort; jy2IZ o
import org.rut.util.algorithm.support.SelectionSort; #kkY@k$4
import org.rut.util.algorithm.support.ShellSort; *pzq.#
qJR!$?
/** 3}1ssU"T
* @author treeroot lo&#(L+2
* @since 2006-2-2 EA<}[4#jS
* @version 1.0 VyG4(Xva
*/ P5QQpY{<I
public class SortUtil { _L.n,
public final static int INSERT = 1; mV9A{h
public final static int BUBBLE = 2; O$!*%TL
public final static int SELECTION = 3; _DPOyR2
public final static int SHELL = 4; \'?#i@O
public final static int QUICK = 5; o[6y+<'o
public final static int IMPROVED_QUICK = 6; w8~K/>!f
public final static int MERGE = 7; PHM:W%g:
public final static int IMPROVED_MERGE = 8; 7q9gngT1LA
public final static int HEAP = 9; ~H@+D}J?
^%oUmwP<$
public static void sort(int[] data) { 6er(%4!
sort(data, IMPROVED_QUICK); |E/L.gdP7
} oholt/gb+0
private static String[] name={ u>T76,8|\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e5v`;(^M
}; ? S=W&
:_dICxaLZT
private static Sort[] impl=new Sort[]{ GSVdb/+
new InsertSort(), IvBGpT"(I
new BubbleSort(), wod/&!)]A
new SelectionSort(), 17UK1Jx,
new ShellSort(), 0^!Gib
new QuickSort(), f!GHEhQ9
new ImprovedQuickSort(), 8LM#WIm?
new MergeSort(), E%k7wM {
new ImprovedMergeSort(), j^u[F"
new HeapSort() Q2'eQ0W{o
}; 6517Km 4-
j64 4V|z
public static String toString(int algorithm){ $@[)nvV\
return name[algorithm-1]; MR9/Y:Nm
} x6yW:tUG5
,r+"7$
public static void sort(int[] data, int algorithm) { Etnb3<^[t
impl[algorithm-1].sort(data); JAb$M{t
} mA{#]Yvf1
=&NOHT>
public static interface Sort { a>Re^GT+z
public void sort(int[] data); b&t[S[P.V
} 2>y:N.
$Lq:=7&LRn
public static void swap(int[] data, int i, int j) { =Lw3 \5l
int temp = data; 0^<,(]!
data = data[j]; ,w\ wQn>]K
data[j] = temp; 6Dzs?P
} LDX*<(
} IKm&xzV-