[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; hK|Ul]qI
} 8Xs8A.
int i1=l; I1&aM}y{G
int i2=mid+1; MnW+25=N
for(int cur=l;cur<=r;cur++){ k$}fWR
if(i1==mid+1) #A8sLkY
data[cur]=temp[i2++]; *}W_+qo"
else if(i2>r) 8*a&Jl
data[cur]=temp[i1++]; `~q<N
else if(temp[i1] data[cur]=temp[i1++]; Yu2Bkq+
else ht}wEvv
data[cur]=temp[i2++]; uFga~&#g
} #gw]'&{8D
} /; 85i6
IV)j1
} jmW7)jT8:
n'6jou
改进后的归并排序: +X]vl=0
7"D.L-H
package org.rut.util.algorithm.support; BTrn0
;i+#fQO7Q
import org.rut.util.algorithm.SortUtil; 8DaL,bi*.
^sWT:BDh
/** o2\8OxcA
* @author treeroot R@rBEW&
* @since 2006-2-2 d m%8K6|
* @version 1.0 ;i:d+!3XwC
*/ QkC(uS
public class ImprovedMergeSort implements SortUtil.Sort { q'MZ R'<@
;gr9/Vl
private static final int THRESHOLD = 10; X!g#T9kG
Uf+%W;}
/* Q&bM\;Ml
* (non-Javadoc) ]e@Oiq
* Pk)1WK7E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -A!%*9Z
*/ 7Hu3>4<
public void sort(int[] data) { J5jvouR
int[] temp=new int[data.length]; jEJT-*I1+
mergeSort(data,temp,0,data.length-1); uM6+?A9@l
} k"w"hg&e
jo@J}`\Zt
private void mergeSort(int[] data, int[] temp, int l, int r) { 0:d_Yv,D
int i, j, k; 8)I^ t81
int mid = (l + r) / 2; H$4:lH&(
if (l == r) *~i ])4
return; /&94 eC
if ((mid - l) >= THRESHOLD) ,zY$8y]
mergeSort(data, temp, l, mid); lHX72s|V
else 8}UIbF
insertSort(data, l, mid - l + 1); b|W=pSTY
if ((r - mid) > THRESHOLD) pz>>)c`
mergeSort(data, temp, mid + 1, r); 4HA<P6L
else A3@6N(
insertSort(data, mid + 1, r - mid); *;*r8[U}q
a:6m7U)P#5
for (i = l; i <= mid; i++) { d6 5L!4
temp = data; 5XBH$&Td
} V "h +L7T
for (j = 1; j <= r - mid; j++) { @;RXLq/8
temp[r - j + 1] = data[j + mid]; V~5jfcd
} aw42oLk
int a = temp[l]; }`~+]9<
int b = temp[r]; ^J;bso`
for (i = l, j = r, k = l; k <= r; k++) { }pu27F)&
if (a < b) { LFtt gY
data[k] = temp[i++]; %bfQ$a:
a = temp; [q #\D
} else { C~iL3Cb
data[k] = temp[j--]; Dm<A ^u8
b = temp[j]; n6a`;0f[R
} kW&TJP+5*
} [IhYh<i
} pIX`MlBdF
?(i{y~
/** *!7O~yQ
* @param data d-dEQKI?;
* @param l N<injx
* @param i e**qF=HCw
*/ [HZv8HU|
private void insertSort(int[] data, int start, int len) { 6,{$J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0KOgw*>_
} /s}}&u/
} G<v&4/\p`M
} ~M4;
} ,nDaqQ-C!!
yaH Zt`Y
堆排序： YcpoL@ab
;;N9>M?b
package org.rut.util.algorithm.support; OpYY{f
I9hK}D
import org.rut.util.algorithm.SortUtil; kpN)zxfk
%OOl'o"V{s
/** _zi|
* @author treeroot WEi2=3dV
* @since 2006-2-2 @2 fg~2M1
* @version 1.0 E09:E
*/ v z '&%(
public class HeapSort implements SortUtil.Sort{ 0.k7oB;f(@
7%eK37@u
/* (non-Javadoc) SKsKPqz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wD'SPk5S?
*/ 'AH0ww_)n
public void sort(int[] data) { DN57p!z
MaxHeap h=new MaxHeap(); o:Sa, !DK
h.init(data); &FN.:_E
for(int i=0;i h.remove(); ckE-",G
System.arraycopy(h.queue,1,data,0,data.length); _>X+ZlpU:
} 0^K">
eV?2LtT#5
private static class MaxHeap{ Zba2d,8/
J{fH['tzO
void init(int[] data){ RdRp.pb8
this.queue=new int[data.length+1]; l]l'4@1
for(int i=0;i queue[++size]=data; 338k?nHxv
fixUp(size); U#WF;q0L
} l)l^[2
} _.Uh)-yR
%aVq+kC h
private int size=0; +OWX'~fd<
'kO!^6=4M
private int[] queue; lp%pbx43s
.jjG(L
public int get() { ~%kkeh\j
return queue[1]; P:MT*ra*,
} t=W}SH
mSl.mi(JiZ
public void remove() { |imM#wF
SortUtil.swap(queue,1,size--); hy"\RW
fixDown(1); 0[?Xxk}s0
} ?QdWrE_
file://fixdown aQ\$A`?
private void fixDown(int k) { 57
int j; [~c|mOk
while ((j = k << 1) <= size) { fN1-d&T
if (j < size %26amp;%26amp; queue[j] j++; LIF7/$,0
if (queue[k]>queue[j]) file://不用交换 )W _v:?A9
break; 68C%B9.b'
SortUtil.swap(queue,j,k); |"CZT#
k = j; nazZ*lC
} Gm^U;u}=f
} q ,]L$
private void fixUp(int k) { Zw S F^
while (k > 1) { U$D65B4=
int j = k >> 1; N]=q|D
if (queue[j]>queue[k]) 8\A#CQ5b
break; eF-."1
SortUtil.swap(queue,j,k); qHlQ+:n
k = j; 9w"4K.
} a fW@T2
} YHygo#4=8
Pw`8Wj
} yZU6xY
6HWE~`ok6
} =ncVnW{
i#Bf"W{F
SortUtil： `%9 uE(
ShP^A"Do
package org.rut.util.algorithm; .:%0E`E
Zaf:fsj>
import org.rut.util.algorithm.support.BubbleSort; jZkcBIK2
import org.rut.util.algorithm.support.HeapSort; aP@N)"
import org.rut.util.algorithm.support.ImprovedMergeSort; [uN? ~lp\%
import org.rut.util.algorithm.support.ImprovedQuickSort; 2E)-M9ds
import org.rut.util.algorithm.support.InsertSort; ,Np0wg0
import org.rut.util.algorithm.support.MergeSort; k|PN0&J
import org.rut.util.algorithm.support.QuickSort; M; tqp8
import org.rut.util.algorithm.support.SelectionSort; :vQrOn18p
import org.rut.util.algorithm.support.ShellSort; :zke %Yx
\aUC(K~o\;
/** V1`o%;j
* @author treeroot RmeD$>7
* @since 2006-2-2 SBk4_J/_
* @version 1.0 k:#!zK}
*/ [ =9T*Sp
public class SortUtil { #:U%mHT(_
public final static int INSERT = 1; )e=D(qd
public final static int BUBBLE = 2; Em !/a$
public final static int SELECTION = 3; ' ;FnIZ
public final static int SHELL = 4; Ma']?Rb`
public final static int QUICK = 5; S3*`jF>q
public final static int IMPROVED_QUICK = 6; h-K_Lr]
public final static int MERGE = 7; vm7z,FfN
public final static int IMPROVED_MERGE = 8; @&3EJ1
public final static int HEAP = 9; .K2qXw"S#
n&qg;TT
public static void sort(int[] data) { ;LPfXpR
sort(data, IMPROVED_QUICK); ^Hnb}L
} CMG&7(MR
private static String[] name={ #3@rS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S8wLmd>
}; N&+x+;Kx
$)ijN^hV
private static Sort[] impl=new Sort[]{ U175{N%3
new InsertSort(), c&?m>2^6
new BubbleSort(), /}fHt^2H
new SelectionSort(), {{D)YldtA
new ShellSort(), "W7K"=X
new QuickSort(), Zd}9O jz5
new ImprovedQuickSort(), m_?~OL S
new MergeSort(), D4lG[qb
new ImprovedMergeSort(), 0oZ= yh
new HeapSort() O1U=X:Zl
}; FQ7T'G![
< #}5IQ5`Z
public static String toString(int algorithm){ ~IfJwBn-i
return name[algorithm-1]; tGh~!|P
} Ms5ap<q#
HIR~"It$
public static void sort(int[] data, int algorithm) { HU8900k+
impl[algorithm-1].sort(data); 7cT~oV !G_
} p{Yv3dNl
F^t DL:
public static interface Sort { Vvn2 Ep
public void sort(int[] data); 2~1SQ.Q<RY
} ^w@%cVh
t?x<g<PJ4
public static void swap(int[] data, int i, int j) { rq/yD,I,
int temp = data; r6MMCJ|G
data = data[j]; 3G)#5Lf<
data[j] = temp; 7uS~MW
} ?GoR^p #p
} l|~A#kq