[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; ^+m+zd_
} i6 (a@KRY
int i1=l; O=dJi9;`#_
int i2=mid+1; A6pjRxg
for(int cur=l;cur<=r;cur++){ y:vxE8$Q
if(i1==mid+1) DANw1_X\
data[cur]=temp[i2++]; )h8\u_U
else if(i2>r) QtJg^2@
data[cur]=temp[i1++]; *s>BG1$<
else if(temp[i1] data[cur]=temp[i1++]; 't9hXzAfW
else Myq5b`z
data[cur]=temp[i2++]; o,!T2&}
} eU N"w,@y
} C$@yG)Pj
p!<$vE
} {M?vBgR\B
.^m>AKC0cX
改进后的归并排序: ryc& n5
"n=vN<8(o
package org.rut.util.algorithm.support; V2<?ol
,s_T pq
import org.rut.util.algorithm.SortUtil; OHflIeq#@
$Tb G+Eb8
/** a<A+4uXyD
* @author treeroot Ii^5\v|C
* @since 2006-2-2 ph#tgLJ
* @version 1.0 `)Z!V?&!
*/ JB&\i#
public class ImprovedMergeSort implements SortUtil.Sort { vQa'S-@u
<6G11-K
private static final int THRESHOLD = 10; ?"KC-u|
w1|A5q'M
/* f*24)Wn<
* (non-Javadoc) l?q%?v8
* %Jf<l&K.`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |K^"3`SJ
*/ H-xFiF
public void sort(int[] data) { 1<<kA:d
int[] temp=new int[data.length]; J-<^P5
mergeSort(data,temp,0,data.length-1); [M%9_CfZOy
} wV)}a5+
bLnrbid
private void mergeSort(int[] data, int[] temp, int l, int r) { /^ " 83?_
int i, j, k; hG_?8:W8HT
int mid = (l + r) / 2; hHPs&EA.p
if (l == r) n 8pt\i0
return; LjH*rjS4
if ((mid - l) >= THRESHOLD) eJo3 MK
mergeSort(data, temp, l, mid); 2PR^:h2
else cf7v[ZZ}
insertSort(data, l, mid - l + 1); u?[ q=0.J7
if ((r - mid) > THRESHOLD) !8@*F
mergeSort(data, temp, mid + 1, r); )C.yF)Ql
else 0'r%,0
insertSort(data, mid + 1, r - mid); U5]pi+r
gBf4's
for (i = l; i <= mid; i++) { jkF8\dR
temp = data; 1[*{(e
} P &)1Rka
for (j = 1; j <= r - mid; j++) { oQ7]=|
temp[r - j + 1] = data[j + mid]; gs W0
} 6st^4S5
int a = temp[l]; $^tv45
int b = temp[r]; vwr74A.g0
for (i = l, j = r, k = l; k <= r; k++) { {@u<3 s
if (a < b) { {R^'=(YFy
data[k] = temp[i++]; sgr=w+",Q
a = temp; %ObD2)s6:^
} else { 3[XQR8o
data[k] = temp[j--]; h)v^q: ='
b = temp[j]; 1KYN>s:
} ]p~IYNl2%j
} Q8MS,7y/
} m4[g6pNx~
?'r9"M>
/** 'lS`s(
* @param data FhIqy %X
* @param l 1|?K\B
* @param i w^1Fi8+
*/ R1-k3;v^
private void insertSort(int[] data, int start, int len) { J@9}`y=K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~^vC,]hU
} -K[782Q
} p[2GkP
} 5=KF!?
} h~7,`fo
0"g@!gSrQ
堆排序： YGsS4ia*4i
m/`IGT5J
package org.rut.util.algorithm.support; fRm}S>Nibb
p[WX'M0f
import org.rut.util.algorithm.SortUtil; y>\S@I
WjMS5^ _
/** OSzjK7:
* @author treeroot 2BzqY`O
* @since 2006-2-2 $cVi;2$p
* @version 1.0 @1R8-aa-r
*/ w.N,)]h
public class HeapSort implements SortUtil.Sort{ }xlKonk
+@VYs*&&
/* (non-Javadoc) y5m!*=`l`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H0*5_OJ!i
*/ x"(9II*
public void sort(int[] data) { T ^JuZG
MaxHeap h=new MaxHeap(); 1'G8o=~
h.init(data); %q_Miu@
for(int i=0;i h.remove(); 9YF$CXonE=
System.arraycopy(h.queue,1,data,0,data.length); s T3p>8n
} #3kXmeyrD
8G ]w,eF
private static class MaxHeap{ [$ :
e@F|NCQ.9
void init(int[] data){ r-w2\2
this.queue=new int[data.length+1]; !5x Ly6=}
for(int i=0;i queue[++size]=data; "D*Wi7
fixUp(size); &B!%fd.'
} w5]l1}rl
} J<JBdk
)'q%2%Ak
private int size=0; KIL18$3J
)qPSD2h
private int[] queue; GLKO]y
2r];V'r
public int get() { zL s^,x
return queue[1]; j.3o W
} ,2WH/"
m%QqmTH
public void remove() { )Mzt3u
SortUtil.swap(queue,1,size--); ;^l_i4A
fixDown(1); w 7tC|^#G
} |Vx~fKS\
file://fixdown -O&"|
private void fixDown(int k) { z^sST
int j; ,m07p~,V
while ((j = k << 1) <= size) { S2$5!(P
if (j < size %26amp;%26amp; queue[j] j++; .#^0pv!
if (queue[k]>queue[j]) file://不用交换 xKp0r1}
break; |0{ i9.=
SortUtil.swap(queue,j,k); Kla:e[{
k = j; j"<Y!Y3
} NMjnL&P`
} 015Owi
private void fixUp(int k) { jeDlH6X'
while (k > 1) { =sQ(iso%f
int j = k >> 1; ~q%
if (queue[j]>queue[k]) *kaJ*Ti-/
break; %OI4a5V*l
SortUtil.swap(queue,j,k); BV9*s
k = j; qtSs)n
} 9y"TDo
} p q-!WQ
lSc,AOXp
} |l90g|isJ
Sa]mm/G
} &]nd!N
oA3d^%(c
SortUtil： Mr6E/7g%
C<he4n.
package org.rut.util.algorithm; K[?R[
KCXwn
import org.rut.util.algorithm.support.BubbleSort; R!{7OkC
import org.rut.util.algorithm.support.HeapSort; f]}}yBte`
import org.rut.util.algorithm.support.ImprovedMergeSort; 'yNPhI
import org.rut.util.algorithm.support.ImprovedQuickSort; 5fHYc0
import org.rut.util.algorithm.support.InsertSort; <`JG>H*B6
import org.rut.util.algorithm.support.MergeSort; hU,$|_WDy
import org.rut.util.algorithm.support.QuickSort; 4]UT+'RubX
import org.rut.util.algorithm.support.SelectionSort; *5wv%-
import org.rut.util.algorithm.support.ShellSort; 3c 28!3p
b~!om
/** ug6r]0]
* @author treeroot WzG07 2w
* @since 2006-2-2 *4#on>
* @version 1.0 [&n|\!
*/ ;4d.)-<No_
public class SortUtil { *IlQ5+3I
public final static int INSERT = 1; yv${M u
public final static int BUBBLE = 2; 0^>E`/
public final static int SELECTION = 3; v:P!(`sF
public final static int SHELL = 4; silp<13HN
public final static int QUICK = 5; Kcn\g.
public final static int IMPROVED_QUICK = 6; EW5]!%
public final static int MERGE = 7; x_ySf!ih
public final static int IMPROVED_MERGE = 8; k E_ky)
public final static int HEAP = 9; ry,}F@P&
sM9-0A
public static void sort(int[] data) { b@-)Fy4d2
sort(data, IMPROVED_QUICK); P`!Ak@N
} 9`&77+|;e
private static String[] name={ t/Z!O z6ZE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P7 8uq
}; {@\/a
A}eOR=E
private static Sort[] impl=new Sort[]{ ocP*\NR
new InsertSort(), ~}%&p& p
new BubbleSort(), L`[F~$|
new SelectionSort(), *'^:S#=
new ShellSort(), 7S2c|U4IM
new QuickSort(), N K"%DU<
new ImprovedQuickSort(), [Ye5Y?
new MergeSort(), ~D!ESe*=
new ImprovedMergeSort(), M;@Ex`+?i
new HeapSort() | W?[,|e
}; q+J0}y{#8)
Fs9W>*(
public static String toString(int algorithm){ #,Bj!'Q'-
return name[algorithm-1]; q5gP~*?
} coO.kTO;
ULbP_y>(Y
public static void sort(int[] data, int algorithm) { #x|VfN5f
impl[algorithm-1].sort(data); >;.*
} MZiF];OY
|bvGYsn_#=
public static interface Sort { W["HDR
public void sort(int[] data); jrdtd6b}
} F$C+R&V_
/~"AG l.
public static void swap(int[] data, int i, int j) { '7=<#Blc
int temp = data; U:Fpj~E_w
data = data[j]; c8tP+O9
data[j] = temp; p(7c33SyF
} x[a'(5PwY
} 1Y2a*J