[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; .9r+LA{
} ;IklS*p]
int i1=l; &OpGcbf1
int i2=mid+1; Ur^~fW1o
for(int cur=l;cur<=r;cur++){ cb ICO
if(i1==mid+1) t^N 92$|
data[cur]=temp[i2++]; a>w@9
else if(i2>r) VKzY6
data[cur]=temp[i1++]; z D&5R/I
else if(temp[i1] data[cur]=temp[i1++]; !nX}\lw
else z@WuKRsi
data[cur]=temp[i2++]; 6$42-a%b
} ~nul[>z
} fb8"hO]s
6]`XW0{C
} `$V7AqX(
V4c$V]7
改进后的归并排序: >GRL5Iow
e+Qq a4
package org.rut.util.algorithm.support; Z' cQ< f
cY&SKV#
import org.rut.util.algorithm.SortUtil; /{|<3CEe
kVu8/*Q
/** bwHl}3
* @author treeroot G8Hj<3`
* @since 2006-2-2 Q<TD5t9
* @version 1.0 y]1:IJL2;
*/ TRB)cJZ?
public class ImprovedMergeSort implements SortUtil.Sort { d=?Kk4Ag
KC@F"/h`/
private static final int THRESHOLD = 10; GtYtB2U
AGxtmBB;
/* B.:DW3
* (non-Javadoc) dy>iIc>
* `gI`Cq4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Q-Y$ ^\
*/ *{3&?pxx
public void sort(int[] data) { !rmXeN]-r
int[] temp=new int[data.length]; Q@M>DA!d^V
mergeSort(data,temp,0,data.length-1); ;'^5$q
} EN OaC
TDvUiJm
private void mergeSort(int[] data, int[] temp, int l, int r) { 41\r7 BS
int i, j, k; m6V:x/'=
int mid = (l + r) / 2; +kh#Jq.
if (l == r) #X~{p4Lr
return; FbvwzZ
if ((mid - l) >= THRESHOLD) S1_X@[t
mergeSort(data, temp, l, mid); xR9<I:^&
else NF/@'QRT
insertSort(data, l, mid - l + 1); .#py5&`%
if ((r - mid) > THRESHOLD) YX||\
mergeSort(data, temp, mid + 1, r); nveHLHvC7
else .=y-T=}
insertSort(data, mid + 1, r - mid); e1*<9&S
o6{[7jI
for (i = l; i <= mid; i++) { Mi|PhDXMh
temp = data; >]6inS9
} ;.%Ii w&WG
for (j = 1; j <= r - mid; j++) { bnll-G|
temp[r - j + 1] = data[j + mid]; z|';Y!kQ
} `5VEGSP]
int a = temp[l]; ~d+.w%Z`
int b = temp[r]; Gz>M Y4+G
for (i = l, j = r, k = l; k <= r; k++) { <<xUh|zE
if (a < b) { B/P E{ /
data[k] = temp[i++]; 9XU"Ppv
a = temp; iy{n"#uX
} else { xwSi}.
data[k] = temp[j--]; 5C03)Go3Z
b = temp[j]; w!~%v #
} | rY.IbL
} f:/[
} q7itznQSKc
sbWen?
/** Pfy2PpA
* @param data |AY`OVgcKD
* @param l C26vH#C
* @param i NGA8JV/U
*/ }sbh|#
private void insertSort(int[] data, int start, int len) { V$D+Joj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mM6g-)cV
} =Gka;,n
} -pWnO9q
} (e:@7W)L
} 7=$@bHEF#*
?*2DR:o>@
堆排序： v'x)AbbC
^lF'KW$
package org.rut.util.algorithm.support; X\?PnD`,
8M{-RlR
import org.rut.util.algorithm.SortUtil; [2]Ti_ >D
IK:F~I
/** b^SQCX+P
* @author treeroot E?L^L3s
* @since 2006-2-2 ZGstD2N$
* @version 1.0 'N-nFc^
*/ %Tc P[<
public class HeapSort implements SortUtil.Sort{ rQ_!/J[9
?{@UB*
/* (non-Javadoc) zz4TJ('
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z*9Qeu-N:
*/ H9@24NFb
public void sort(int[] data) { C'6yt
MaxHeap h=new MaxHeap(); X(sN+7DOV
h.init(data); Ec44JD
for(int i=0;i h.remove(); (\CT "u-
System.arraycopy(h.queue,1,data,0,data.length); f)~j'e
} 9-Y.8:A`
3M5+!H
private static class MaxHeap{ K>!+5A$6i
NJ^H"FLS:
void init(int[] data){ !=C74$TH
this.queue=new int[data.length+1]; PrA?e{B5m
for(int i=0;i queue[++size]=data; lT`y=qR|
fixUp(size); 0E6>PE;
} S;!l"1[;
} : h"Bf@3
{8!\aYI
private int size=0; 0QWc1L
~1_v;LhH5+
private int[] queue; 29W~<E8K-
Dz<"eyB\
public int get() { ;y"=3-=vM"
return queue[1]; q_5hKipd\b
} hKG)* Q
=/ b2e\
public void remove() { -E*VF{IG1
SortUtil.swap(queue,1,size--); kOu C@~,
fixDown(1); \`FpBE_e)
} KdBE[A-1^M
file://fixdown EWcqMD]4u
private void fixDown(int k) { x]e&G!|
int j; Bl\/q83(
while ((j = k << 1) <= size) { B)q 5m y
if (j < size %26amp;%26amp; queue[j] j++; 676r0`
if (queue[k]>queue[j]) file://不用交换 vlygS(Y_7
break; X9|={ng)g#
SortUtil.swap(queue,j,k); +,"O#`sy<
k = j; S:.Vt&+NJ
} ws^ 7J/8
} !>n^ ;u
private void fixUp(int k) { i!|OFU6
while (k > 1) { 5<Lal^c D
int j = k >> 1; 2 Nr*
if (queue[j]>queue[k]) HDV@d^]-
break; 4#dS.UfI
SortUtil.swap(queue,j,k); ( 04clU^F
k = j; _4Ciai2Ql
} c.<bz
} l r16*2.
K!L0|WH%!
} _LYI#D
vtm?x,h
} q6A"+w,N
:1O49g3R
SortUtil： t08E 2sI
u3[A~V|0=
package org.rut.util.algorithm; )BJZ{E*
[EdX6
import org.rut.util.algorithm.support.BubbleSort; +*'^T)sj/
import org.rut.util.algorithm.support.HeapSort; \&KfIh8
import org.rut.util.algorithm.support.ImprovedMergeSort; >[$j(k^
import org.rut.util.algorithm.support.ImprovedQuickSort; 1@$n)r`
import org.rut.util.algorithm.support.InsertSort; AW6"1(D
import org.rut.util.algorithm.support.MergeSort; L}*s_'_e^>
import org.rut.util.algorithm.support.QuickSort; Cyn_UE
import org.rut.util.algorithm.support.SelectionSort; `vMrlKq
import org.rut.util.algorithm.support.ShellSort; _?aI/D
u{Rgk:bn
/** AA&5wDMV>
* @author treeroot NFAjh?#
* @since 2006-2-2 $,s"c(pv[,
* @version 1.0 [v,Y-}wQ)
*/ xE0'eC5n^
public class SortUtil { l-~ o&n
public final static int INSERT = 1; #9's^}i
public final static int BUBBLE = 2; w1N-`S:
public final static int SELECTION = 3; (8XP7c]5
public final static int SHELL = 4; rQrh(~\:
public final static int QUICK = 5; @v:p)|Ne;
public final static int IMPROVED_QUICK = 6; (E*pM$
public final static int MERGE = 7; ^U5g7Emf
public final static int IMPROVED_MERGE = 8; 8c1ma
public final static int HEAP = 9; Ig.9:v`
o 9?#;B$
public static void sort(int[] data) { [f8mh88r
sort(data, IMPROVED_QUICK); )C1ihm!7\
} GIs *;ps7w
private static String[] name={ gO9\pI2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <$:Hf@tpMo
}; *# 7 1aZ
n0T>sE-9
private static Sort[] impl=new Sort[]{ D.ajO^[
new InsertSort(), ?gGmJl
new BubbleSort(), %]KOxaf_z
new SelectionSort(), >3,t`Z:
new ShellSort(), 9 M<3m
new QuickSort(), fxcCz 5
new ImprovedQuickSort(), '^6jRI,
new MergeSort(), i*3*)ly
new ImprovedMergeSort(), +{7/+Zz
new HeapSort() W["c3c
}; IW~q,X+`V
UpoTXAD}k
public static String toString(int algorithm){ a6/$}lCq
return name[algorithm-1]; v"~0 3-SX
} f:!b0j
U~nW>WJ+.
public static void sort(int[] data, int algorithm) { 2Jl$/W 3
impl[algorithm-1].sort(data); EPn0ZwnS:M
} Ra~|;( %d
{~=Z%Cj2Q
public static interface Sort { BT3X7Cx
public void sort(int[] data); eGEeWJ}[$
} M{
t:N3k ;k
public static void swap(int[] data, int i, int j) { FTk`Mq
int temp = data; & 6-8$
data = data[j]; :Qd{V3*]
data[j] = temp; ~d)2>A2:
} uJg|
} [\|p~Qb)s