[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; #v\o@ArX
} X*< !_3
int i1=l; i-M<_62c
int i2=mid+1; (_nU}<y_i
for(int cur=l;cur<=r;cur++){ ?656P=b)
if(i1==mid+1) /D,<2>o
data[cur]=temp[i2++]; EY}*}-3
else if(i2>r) Z@gEJ^"yA"
data[cur]=temp[i1++]; JWVn@)s
else if(temp[i1] data[cur]=temp[i1++]; |0$7{nQ
else 'q7&MM'oS^
data[cur]=temp[i2++]; hwi$:[
} zOn%\
} d 6=Z=4w
Gq =i-I
} Noi+mL
owe6ge7m
改进后的归并排序: Q60'5Wt
Q7pjF`wu
package org.rut.util.algorithm.support; d37|o3oC
r68d\N`.
import org.rut.util.algorithm.SortUtil; %mNd9 ]<
3Bbd2[<W
/** 4;)aGN{e
* @author treeroot #<81`%
* @since 2006-2-2 LPS]TG\
* @version 1.0 2|JtRE+
*/ Jl@YBzDfF
public class ImprovedMergeSort implements SortUtil.Sort { 8fC5O
HImQ.y!B
private static final int THRESHOLD = 10; fDrjR6xV
k*|WI$
/* xF8 8'p'
* (non-Javadoc) :89AYqT"
* Rd,5&X$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KOit7+Q
*/ b>'y[P!
public void sort(int[] data) { ~mk>9Gp
int[] temp=new int[data.length]; ,Wlw#1fP
mergeSort(data,temp,0,data.length-1); NU(YllPB
} d_)VeuE2
C7_nA:Rc
private void mergeSort(int[] data, int[] temp, int l, int r) { dH~i
int i, j, k; [w?v !8l
int mid = (l + r) / 2; uU!}/mbo
if (l == r) }]+k
return; IaYaIEL-
if ((mid - l) >= THRESHOLD) gn6@x
mergeSort(data, temp, l, mid); C o,"
else `FRdo
insertSort(data, l, mid - l + 1); arb'.:[z^
if ((r - mid) > THRESHOLD) !b?`TUt
mergeSort(data, temp, mid + 1, r); 6rh^?B
else H57wzG{xG
insertSort(data, mid + 1, r - mid); `8b4P>';O'
n|) JhXQ
for (i = l; i <= mid; i++) { p#>d1R1&
temp = data; MxLi'R=
} N6w!V]b
for (j = 1; j <= r - mid; j++) { i?]`9z
temp[r - j + 1] = data[j + mid]; 8=WX`*-uH
} (dQsR sA
int a = temp[l]; ]<:qMLg
int b = temp[r]; _g%h:G&^
for (i = l, j = r, k = l; k <= r; k++) { A*TO0L
if (a < b) { :nn(Ndlz9
data[k] = temp[i++]; p.x!dt\1kC
a = temp; uTRFeO>
} else { 3<X*wVi)NN
data[k] = temp[j--]; 4&wwmAp^
b = temp[j]; 7qEc9S@
} df7xpV
} oWV^o8& GH
} ;[!W*8.c
?.6fVSa
/** 4nU+Wj?T
* @param data Ht&%`\9s
* @param l _7N^<'B
* @param i #jT=;G7f2
*/ I@l }%L
private void insertSort(int[] data, int start, int len) { N5Ih+8zT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (laVmU?I7
} 3AcCa>
} ' qN"!\
} v<V9Z <ub
} Hi#f Qji
+~'ap'k m
堆排序： o`~%}3
O"m(C[+[
package org.rut.util.algorithm.support; mecm,xwm
5sguv^;C5
import org.rut.util.algorithm.SortUtil; ^u$?& #
1wt(pkNk
/** _OvIi~KW+
* @author treeroot qTrb)95
* @since 2006-2-2 1Gh3o}z
* @version 1.0 f/tJ>^N5
*/ J:G~9~V^
public class HeapSort implements SortUtil.Sort{ "cx#6Bo|
:qrCqFl
/* (non-Javadoc) VTs ,Ln!,U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UCI !>G
*/ E2yL9]K2
public void sort(int[] data) { =6< Am
MaxHeap h=new MaxHeap(); t[HA86X
h.init(data); |5#iPw_wMY
for(int i=0;i h.remove(); #uCE0}N@
System.arraycopy(h.queue,1,data,0,data.length); Rd>PE=u
} V^qkHm e
a:}&v^v
private static class MaxHeap{ OuV f<@a
5<mGG;F
void init(int[] data){ sX|bp)Nw
this.queue=new int[data.length+1]; ;*q
for(int i=0;i queue[++size]=data; qN(,8P\90
fixUp(size); ]n^TN r7
} T5? eb"
} kC=h[<'
Jpr`E&%I6
private int size=0; "t:9jU
}TsND6Ws3
private int[] queue; Is#w=s}2
;}QM#5Xdt
public int get() { WzdE XcY
return queue[1]; hVdPO
} }e4#Mx
[@`Ki
public void remove() { 4A\>O?\
SortUtil.swap(queue,1,size--); FiW>kTM8
fixDown(1); ))eQZ3ap9
} P"ATqQG%D
file://fixdown l_0/g^(
private void fixDown(int k) { _p,1m[&M
int j; (#5TM1/A
while ((j = k << 1) <= size) { MH h;>tw
if (j < size %26amp;%26amp; queue[j] j++; rLJjK$_x
if (queue[k]>queue[j]) file://不用交换 sq1v._^s
break; b,o@m
SortUtil.swap(queue,j,k); JmJNq$2#c
k = j; ,c.(&@
} t+%tN^87:
} %xhA2
private void fixUp(int k) { V;%DS)-
while (k > 1) { Ub%1OQ
int j = k >> 1; J>%uak<
if (queue[j]>queue[k]) ~2M+Me
break; _~a5;[~
SortUtil.swap(queue,j,k); '1[Bbs
k = j; Q|i`s=|
} O&ZVu>`g
} #SIIhpjA(
ZGbY
} jp viX#\S_
*$EcP`K$
} xa$p,_W:'
Mxk0XFA
SortUtil： k(%h{0'
Nx^r&pr
package org.rut.util.algorithm; E;)7#3gY1
wh)Ujgd
import org.rut.util.algorithm.support.BubbleSort; 4Up\_
import org.rut.util.algorithm.support.HeapSort; 0VwmV_6'<W
import org.rut.util.algorithm.support.ImprovedMergeSort; ;1Zz-@
import org.rut.util.algorithm.support.ImprovedQuickSort; 8V(-S,
import org.rut.util.algorithm.support.InsertSort; Az4a|.
import org.rut.util.algorithm.support.MergeSort; NkL>ru!b9
import org.rut.util.algorithm.support.QuickSort; 8*m=U@5]
import org.rut.util.algorithm.support.SelectionSort; x9B5@2J1
import org.rut.util.algorithm.support.ShellSort; J4>k9~q
]] Jg%}o
/** _{f7e^;
* @author treeroot GK\`8xWE
* @since 2006-2-2 J6W"t
* @version 1.0 +VdC g_
*/ %MUh_63bB
public class SortUtil { EhK5<v}
public final static int INSERT = 1; XX;MoE~MM
public final static int BUBBLE = 2; XTPf~Te,=
public final static int SELECTION = 3; 2nA/{W\hC
public final static int SHELL = 4; {Bm7'%i
public final static int QUICK = 5; &&er7_Q
public final static int IMPROVED_QUICK = 6; j%@wQVxq
public final static int MERGE = 7; tG}cmK~%
public final static int IMPROVED_MERGE = 8; 2j(]Bt:
public final static int HEAP = 9; 'D<84|w:1
'X{J~fEI!
public static void sort(int[] data) { ;JAb8dyS2
sort(data, IMPROVED_QUICK); })^%>yLfc|
} |6y(7Ha
private static String[] name={ )EptyH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cO^}A(Ma(
}; 2pn8PQfg)
vivU4:uH3
private static Sort[] impl=new Sort[]{ ;"j>k>tg
new InsertSort(), _7qGo7bpN
new BubbleSort(), DP<[Uz&
new SelectionSort(), 6p1)wf.J
new ShellSort(), I@9[
new QuickSort(), "5@k\?x"
new ImprovedQuickSort(), ._5"FUg
new MergeSort(), ed6eC8@
new ImprovedMergeSort(), &R~)/y0]
new HeapSort() \CDzVO0^
}; t9(sSl
^DWhIxBh
public static String toString(int algorithm){ /O/pAu>
return name[algorithm-1]; -&3mOn& (1
} =abBD
zy!mP
public static void sort(int[] data, int algorithm) { *^_ywqp
impl[algorithm-1].sort(data); DgiMMmpE
} qp)a`'Pq
cJ#|mzup
public static interface Sort { v#WD$9QWs
public void sort(int[] data); T>\r}p
} Sm(t"#dp
6y d/3k
public static void swap(int[] data, int i, int j) { 0CFON2I
int temp = data; syR +;
data = data[j]; #:st>V_h
data[j] = temp; /UAcN1K!B
} dB%q`7O
} "Nlw&+ c7