[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; /O@dqEbc
} 7({"dW
int i1=l; ;{zgp
int i2=mid+1; Spnshv8
for(int cur=l;cur<=r;cur++){ Nan@SuKY
if(i1==mid+1) %`kO\q_
data[cur]=temp[i2++]; E*uz|w3S)Y
else if(i2>r) x}8 U\
data[cur]=temp[i1++]; Jvk!a~e
else if(temp[i1] data[cur]=temp[i1++]; DvBL#iC
else dK5|tWJX
data[cur]=temp[i2++]; Q :<&<i=I
} ^UB<U#8,
} vp"b_x1-
AB!P(
} epcBr_}
wVSk.OOB
改进后的归并排序: DRo?7_
,-C%+SC
package org.rut.util.algorithm.support; rW.o_z03^
:{(` ;fJ
import org.rut.util.algorithm.SortUtil; +zU[rhMk'
th$?#4SbR
/** (iwZs:k-
* @author treeroot Z'vic#
* @since 2006-2-2 O>5xFz'm
* @version 1.0 QO0#p1fom'
*/ q&j4PR{
public class ImprovedMergeSort implements SortUtil.Sort { cTU%=/gbc<
}.nHT0l
private static final int THRESHOLD = 10; IQ${2Dpg[
f.Uvf^T}2
/* mHm"QBa!
* (non-Javadoc) q0Hor
* O?6ph4'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8"fZ>XQ
*/ tp6-j`7u
public void sort(int[] data) { Zj(2$9IU
int[] temp=new int[data.length]; |;G9K`8
mergeSort(data,temp,0,data.length-1); jp~C''Sj
} #s4v0auK
=B0#z]qu
private void mergeSort(int[] data, int[] temp, int l, int r) { Gu3# y"a>
int i, j, k; &YSjwRr
int mid = (l + r) / 2; (?G?9M#7_
if (l == r) -3z$~ {
return; |#y+iXTJ
if ((mid - l) >= THRESHOLD) z'FpP
mergeSort(data, temp, l, mid); E{Tvjh+
else _{eH" ,(
insertSort(data, l, mid - l + 1); >uu]K
if ((r - mid) > THRESHOLD) zA~aiX
mergeSort(data, temp, mid + 1, r); %\ifnIQ
else MJ=(rp=YU9
insertSort(data, mid + 1, r - mid); ]vFtByqn
&jg..R
for (i = l; i <= mid; i++) { 0Gq}x;8H&
temp = data; 'b?Px}
} (M>[D!Yt
for (j = 1; j <= r - mid; j++) { B 66-l!xa
temp[r - j + 1] = data[j + mid]; 4Ou|4WjnL
} 'Ti7}K
int a = temp[l]; jjT|@\-u
int b = temp[r]; pb\W7G
for (i = l, j = r, k = l; k <= r; k++) { >=T\=y
if (a < b) { &Z.zem?n
data[k] = temp[i++]; l8$7N=Y
a = temp; bv%A;
} else { %,Pwo{SH
data[k] = temp[j--]; CDNh9`
b = temp[j]; "_g3{[es!
} 9d\B*OU
} U2lDTRt
} 55mDLiA
l"C)Ia&/
/** m(B,a,g<
* @param data */T.]^
* @param l L\CufAN
* @param i myR}~Cj;q
*/ _o'3v=5T
private void insertSort(int[] data, int start, int len) { yV'<l .N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hC nqe
} lZt{L0
} Y$@?Y/rhR
} z_A:MoYfo
} &s+F+8"P+
B{In "R8
堆排序： &!adW@y
;;*'<\lP.j
package org.rut.util.algorithm.support; f|U J%}$v;
/5PV|onO
import org.rut.util.algorithm.SortUtil; ~O;'],#Co
f&n6;N
/** UC u4S >
* @author treeroot Ah_Ttj
* @since 2006-2-2 ",qcqG(
* @version 1.0 bG'"l qn
*/ 5bfd8C
public class HeapSort implements SortUtil.Sort{ |t1ij'N
S7I8BS[*v
/* (non-Javadoc) :k-(%E](
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VSxls
*/ cNd;qO0$
public void sort(int[] data) { K;n5[o&c
MaxHeap h=new MaxHeap(); IK /@j
h.init(data); !%1=|PX_
for(int i=0;i h.remove(); pejG%pJ
System.arraycopy(h.queue,1,data,0,data.length); m^9[k,;K
} Z7Y+rP[l
U#7moS'r
private static class MaxHeap{ hDP&~Mk
M_ GN3
void init(int[] data){ A3!xYG=+
this.queue=new int[data.length+1]; :epjJ1mW
for(int i=0;i queue[++size]=data; 9rCvnP=
fixUp(size); jP{W|9@(
} ITq$8
} _6"YWR
-f4>4@y
private int size=0; t$*V*gK{
E&RiEhuv
private int[] queue; 0Xke26ga
T VuDK
public int get() { "%,KZI
return queue[1]; DaK2P;WP
} PCx] >&
|, Lp1
public void remove() { a9w1Z4
SortUtil.swap(queue,1,size--); w<4,;FFlZ/
fixDown(1); HZG<aY="
} .t7mTpi
file://fixdown !Q0aKkMfL
private void fixDown(int k) { '(qVA>S
int j; ,o_Ur.UJ
while ((j = k << 1) <= size) { Py3Y*YP
if (j < size %26amp;%26amp; queue[j] j++; 0VA$ Ige
if (queue[k]>queue[j]) file://不用交换 uPp9 UW
break; +pq/:h
SortUtil.swap(queue,j,k); IhRYV`:
k = j; -%h0`hOG{
} 60A E~
} UP*\p79oO
private void fixUp(int k) { nj@l5[
while (k > 1) { RjOQSy3
int j = k >> 1; }'FNGn.~#
if (queue[j]>queue[k]) (Vvs:h%H
break; tR;? o,T
SortUtil.swap(queue,j,k); s*XwU
k = j; b')Lj]%;k
} :Hn*|+'
} ^LO`6,
D+y_&+&,t
} rLy<3
7n_'2qY
} N@z+h
T9N&Nh7 3
SortUtil： Ao%;!(\I%
`2j \(N,
package org.rut.util.algorithm; RyxEZ7dC<y
~MgU"P>
import org.rut.util.algorithm.support.BubbleSort; e/h2E dY
import org.rut.util.algorithm.support.HeapSort; ?;//%c8,.
import org.rut.util.algorithm.support.ImprovedMergeSort; TDMyZ!d
import org.rut.util.algorithm.support.ImprovedQuickSort; WC?}a^ 8
import org.rut.util.algorithm.support.InsertSort; 'A|OVyH
import org.rut.util.algorithm.support.MergeSort; e2onR~Cf
import org.rut.util.algorithm.support.QuickSort; H"_]Hq
import org.rut.util.algorithm.support.SelectionSort; q*h1=H52
import org.rut.util.algorithm.support.ShellSort; :=0XT`iY
@aA1=9-L
/** ^J([w~&
* @author treeroot uAWmg8
* @since 2006-2-2 gEE6O%]g
* @version 1.0 o*L#S1yL
*/ e-taBrl;
public class SortUtil { kH)JBx.
public final static int INSERT = 1; GmA5E
public final static int BUBBLE = 2; ,sM>{NK9R
public final static int SELECTION = 3; ,w+}Evp])
public final static int SHELL = 4; $p} /&
public final static int QUICK = 5; WLb*\
public final static int IMPROVED_QUICK = 6; #*g.hL<
public final static int MERGE = 7; `#m>3
public final static int IMPROVED_MERGE = 8; zeXMi:X
public final static int HEAP = 9; ~4{E0om@
LGOeBEAMV^
public static void sort(int[] data) { T}?vp~./
sort(data, IMPROVED_QUICK); w'Kc#2
} ddR_+B*H
private static String[] name={ w84 ]s%y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E rf$WPA
}; Cw=wU/)
dXe. 5XC
private static Sort[] impl=new Sort[]{ ,r,~1oV<"
new InsertSort(), w(P\+ m<%
new BubbleSort(), f>u{e~Q,
new SelectionSort(), I3 %P_oW'
new ShellSort(), owA0I'|V-A
new QuickSort(), {GaQV-t
new ImprovedQuickSort(), ]wMp`}$b@L
new MergeSort(), 4HG@moYn@
new ImprovedMergeSort(), f[@M
new HeapSort() 0P5!fXs*
}; 9}4EW4
)6S;w7
public static String toString(int algorithm){ "dKYJ&$
return name[algorithm-1]; $J~~.PUXQ
} +Oae3VFf;
>gt_C'
public static void sort(int[] data, int algorithm) { 9"@P.8_
impl[algorithm-1].sort(data); jJpSn[{
} r "^{?0
I92c!`{
public static interface Sort { >PsP y.
public void sort(int[] data); a?+Ni|+
} !f(aWrw7e6
LNp%]*h
public static void swap(int[] data, int i, int j) { %^L:K5V
int temp = data; )8c`o
data = data[j]; CIM9~:\
data[j] = temp; 8e'0AI_>
} ZOFhX$I
} a.|4`*1[;