[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; fokT)nf~^8
} '*>LZo4
int i1=l; t@.gmUUA
int i2=mid+1; 7OtQK`P"A
for(int cur=l;cur<=r;cur++){ QC<(rx
if(i1==mid+1) h9+ylHW_cp
data[cur]=temp[i2++]; G !1- 20
else if(i2>r) 5?;'26iC
data[cur]=temp[i1++]; +nuv?QB/
else if(temp[i1] data[cur]=temp[i1++]; 6WfyP@f
else 5F2+o#*h
data[cur]=temp[i2++]; vkq?z~GA
} /N%f78 Z
} (53dl(L?
-|[_j$g
} CG9X3%xO%
)[oU|!@
改进后的归并排序: <O5;w
RMC|(Q<
package org.rut.util.algorithm.support; `N(.10~
*`}_e)(k
import org.rut.util.algorithm.SortUtil; Y1k/ngH
sQJM 4'8f
/** qsvUJU
* @author treeroot *~!xeL
* @since 2006-2-2 +ZRsa`'^
* @version 1.0 MP}H 5
*/ 18[f_0@ #
public class ImprovedMergeSort implements SortUtil.Sort { f=K1ZD
:VN<,1s9p^
private static final int THRESHOLD = 10; Od&M^;BQ
WKah$l
/* MCh8Q|Yx4
* (non-Javadoc) ~;eWQwD
* iLmU|jdE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,Qyz2- w
*/ e_1mO 5z
public void sort(int[] data) { 1 9 k$)m
int[] temp=new int[data.length]; n[4Nu`E9
mergeSort(data,temp,0,data.length-1); CPVKz
} (X>y)V
l42m81x"
private void mergeSort(int[] data, int[] temp, int l, int r) { yFpHRfF}
int i, j, k; 'R,d?ikY
int mid = (l + r) / 2; ZC2C`S\xr
if (l == r) 5?O/Aub
return; Q`vyDoF
if ((mid - l) >= THRESHOLD) {t=Nnc15K
mergeSort(data, temp, l, mid); keJec`q=X
else %+I(S`}
insertSort(data, l, mid - l + 1); :/~vaCZ
if ((r - mid) > THRESHOLD) w:Lu
mergeSort(data, temp, mid + 1, r); _23sIUN c3
else ;*Rajq
insertSort(data, mid + 1, r - mid); HO@T2t[
V)@MM2,
for (i = l; i <= mid; i++) { gE ,j\M*
temp = data; ;~1r{kXxA"
} WHNb.>
for (j = 1; j <= r - mid; j++) { .vW~(ZuD
temp[r - j + 1] = data[j + mid]; 4|2$b:t
} VBH[aIW
int a = temp[l]; Nb];LCx
int b = temp[r]; O"#`i{^?2
for (i = l, j = r, k = l; k <= r; k++) { %<M<'jxSca
if (a < b) { dX$])b_Uw
data[k] = temp[i++]; p +T&9
a = temp; D~?kvyJ
} else { %I.{umU
data[k] = temp[j--]; -:~`g*3#
b = temp[j]; `PW=_f={
} he+[
} 9Np0<e3p
} |wLQ)y*
cbwzT0
/** *$cp"
* @param data xc/|#TC8?
* @param l <GNOT"z
* @param i l?R_wu,Q
*/ 0l:5hD,)F
private void insertSort(int[] data, int start, int len) { eXOFAd]>u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X~DXx/9
} P9>C!0 -x
} 6AwnmGL(;;
} w-#0k.T
} H9>&"=".
AN%.LK
堆排序： 2ga}d5lu
4`UT_LcI
package org.rut.util.algorithm.support; ; Q 6:#
N|~&Q!A&
import org.rut.util.algorithm.SortUtil; k9n
\6'A^cE/PX
/** ib&qH_r/
* @author treeroot xaS
* @since 2006-2-2 v'>Yc#VJ
* @version 1.0 E, v1F!
*/ )m'_>-`^:
public class HeapSort implements SortUtil.Sort{ P\AH9#XL
UF%5/SiVX
/* (non-Javadoc) 3LxJ}>]TO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }O>Zu[8a
*/ ;VuB8cnL`
public void sort(int[] data) { ,9pi9\S
MaxHeap h=new MaxHeap(); f2u2Ns0Ym
h.init(data); 5&kR1Bp#-
for(int i=0;i h.remove(); "J.jmR;
System.arraycopy(h.queue,1,data,0,data.length); }dHiW:J>
} \k,bz0
4bBxZY
private static class MaxHeap{ 9F+bWo_m
>ahj|pm
void init(int[] data){ z K(5&u
this.queue=new int[data.length+1]; ;MMFF{
for(int i=0;i queue[++size]=data; ^~aSrREo
fixUp(size); RnrM rOh
} j<KC$[Kt
} <^\r9Qxl
:mrGB3x{
private int size=0; /trc&V
h+W^k+~(
private int[] queue; bS'r}
)q^vitkjup
public int get() { 10J*S[n1
return queue[1]; (J4utw Z
} %:,=J
gQEV;hCO
public void remove() { Ueeay^zN
SortUtil.swap(queue,1,size--); x-pMT3m\D#
fixDown(1); Pc7:hu
} U %ESuq#
file://fixdown cP1jw%3P
private void fixDown(int k) { k:TfE6JZ
int j; f3N:MH-c
while ((j = k << 1) <= size) { 8Vn6* Xn
if (j < size %26amp;%26amp; queue[j] j++; }$)<k
if (queue[k]>queue[j]) file://不用交换 *Vl =PNn-
break; jvV8`BQ{
SortUtil.swap(queue,j,k); z~H Gc"~
k = j; injmP9ed
} gJ&!w8v.
} ,_$"6
private void fixUp(int k) { tTt3D]h(
while (k > 1) { ]#$kA9
int j = k >> 1; LU{Z
if (queue[j]>queue[k]) ]~^/w}(K
break; 8UIL_nPO
SortUtil.swap(queue,j,k); =5ih,>>g
k = j; 4I-p/&Q
} //Gvk|O1
} Oi0;.<kX
JY2 F-0t)
} j''Iai_
!I[n|r"
} 7fay:_
$vBU}~l7
SortUtil： (L>[,YO9
UTQKlwPa
package org.rut.util.algorithm; HD{`w1vcN
k&/)g3(N(
import org.rut.util.algorithm.support.BubbleSort; IDh`0/i]
import org.rut.util.algorithm.support.HeapSort; qN[7zsaj
import org.rut.util.algorithm.support.ImprovedMergeSort; N%f!B"NQ
import org.rut.util.algorithm.support.ImprovedQuickSort; nvPE N
import org.rut.util.algorithm.support.InsertSort; D-GU"^-9
import org.rut.util.algorithm.support.MergeSort; `#rfp 9w
import org.rut.util.algorithm.support.QuickSort; /6?plt&CA
import org.rut.util.algorithm.support.SelectionSort; $3'+V_CZ3
import org.rut.util.algorithm.support.ShellSort; L"iyjL<M
~ ZL`E
/** Fnpn_O XlH
* @author treeroot t^,Qy.L0
* @since 2006-2-2 358/t/4{p
* @version 1.0 Pm^N0L9?q
*/ @;fE%N
public class SortUtil { xLI{=sL
public final static int INSERT = 1; U 0RfovJ
public final static int BUBBLE = 2; HF: T]n,
public final static int SELECTION = 3; LUNs|\&
public final static int SHELL = 4; Wi?%)hur
public final static int QUICK = 5; DME?kh>7
public final static int IMPROVED_QUICK = 6; X-1Vp_(,TP
public final static int MERGE = 7; Z9&D'n)
public final static int IMPROVED_MERGE = 8; 8-a6Q|
public final static int HEAP = 9; uX +<`3O
6I.mc
public static void sort(int[] data) { n[Iu!v\/*
sort(data, IMPROVED_QUICK); ^|GtO.
} n2mw@Ay!
private static String[] name={ %^=!s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ph?0I:eU
}; g>xUS_d>
)v=G}j^
private static Sort[] impl=new Sort[]{ cXcx_-
new InsertSort(), (VaN\+I:T
new BubbleSort(), RVnyl`s
new SelectionSort(), h+3Z.WKhwP
new ShellSort(), `4.sy +2
new QuickSort(), Ig3(|{R
new ImprovedQuickSort(), g]<Z]R`
new MergeSort(), SP*JleQN
new ImprovedMergeSort(), 'ZH<g8:=@
new HeapSort() iM|"H..
}; =)- Q?1q
$Oe58
public static String toString(int algorithm){ %s2"W~
return name[algorithm-1]; ;Uqx&5P}
} "qTC(F9N$.
Q 95
public static void sort(int[] data, int algorithm) { k!/_/^{
impl[algorithm-1].sort(data); 1Bk*G>CX9(
} @zynqh
a\69,%!:
public static interface Sort { S"^KJUUc
public void sort(int[] data); @B'8SLoP
} bsi q9$F
@'r`(o3z!Z
public static void swap(int[] data, int i, int j) { Ui|a}`c
int temp = data; Z;y}gv/{
data = data[j]; bepYeT
data[j] = temp; 3{4/7DcX
} Sq|1f?_gU
} =x0"6gTz>