[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; yIh>j.P
} av&dGsFP
int i1=l; 4cTJ$" v
int i2=mid+1; KSc&6UVz^
for(int cur=l;cur<=r;cur++){ to(OVg7_
if(i1==mid+1) Oh5(8.<y
data[cur]=temp[i2++]; Zj[Bm\8
else if(i2>r) p$0;~1vH
data[cur]=temp[i1++]; M\DUx5dJ,
else if(temp[i1] data[cur]=temp[i1++]; --dGN.*xb4
else (3&@c!E
data[cur]=temp[i2++]; vFV->/u
} 9L*gxI>
} KAO}*?
A|c :&i
} Yono8M;9*
2sk^A ly
改进后的归并排序: x\3tSP7Vp
hJrxb<9@Y0
package org.rut.util.algorithm.support; )jn|+M
d]} 7]
import org.rut.util.algorithm.SortUtil; Gg{@]9
Z"mpE+U*
/** r9yUye}
* @author treeroot ~2S`y=*:
* @since 2006-2-2 axxdW)+K
* @version 1.0 ^{zwIH2I]
*/ ouPwhB,bg
public class ImprovedMergeSort implements SortUtil.Sort { ]9]3=;b>
{(7Dz*0
private static final int THRESHOLD = 10; fc+P`r
#Z"N\49
/* m Wsegq4
* (non-Javadoc) J3}^\k=p"
* Mw\/gm_3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N?p9h{DG
*/ L>).o%(R
public void sort(int[] data) { u> %r(
int[] temp=new int[data.length]; YL;ZZ2A
mergeSort(data,temp,0,data.length-1); (t&P.N/
} (|I0C 'Ki
qWy{{A+
private void mergeSort(int[] data, int[] temp, int l, int r) { ~lzV=c$t
int i, j, k; tkR^dC
int mid = (l + r) / 2; *$1*\oCtz
if (l == r) VVYQIR]!yk
return; s^AQJ{X
if ((mid - l) >= THRESHOLD) [t: =%&B
mergeSort(data, temp, l, mid); ~g;(`g
else /d0LD
insertSort(data, l, mid - l + 1); +O*S>0
if ((r - mid) > THRESHOLD) ) Z0
mergeSort(data, temp, mid + 1, r); +0^N#0)
else Yc"G="XP;
insertSort(data, mid + 1, r - mid); X:j&+d2g0/
&dbX>u q
for (i = l; i <= mid; i++) { hkRv0q.'
temp = data; MztT/31S
} z,P:i$
for (j = 1; j <= r - mid; j++) { &julw;E
temp[r - j + 1] = data[j + mid]; IgLP=mqcWK
} qusgX;)
int a = temp[l]; }zlvs a+
int b = temp[r]; 5\S)8j `8
for (i = l, j = r, k = l; k <= r; k++) { {>5z~OV
if (a < b) { "3Ag+>tuRW
data[k] = temp[i++]; wAVO%8u
a = temp; #v89`$#`2
} else { Ts}5Nk8%
data[k] = temp[j--]; deda=%w0
b = temp[j]; :>Z0Kb}7
} #Ru+|KL
} AZI%KM[
} ~.VWrHC
.J&NM(qeZ
/** RRV@nDf
* @param data jQ%}e"
* @param l :*/<eT_
* @param i \7$m[h{l
*/ 1[} =,uaM
private void insertSort(int[] data, int start, int len) { Kcsje_I-M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v9x $`
} YV.*8'*
} z]gxkol\
} ^Ac0#oX]M
} JBeC\ \QX
RLw=y{%p
堆排序： `w[0q?}"`
_&19OD%
package org.rut.util.algorithm.support; K{x<zv&,
NV36Q^Am[
import org.rut.util.algorithm.SortUtil; `axNeqM
N95"dNZE
/** t=xO12Z
* @author treeroot NO`LSF
* @since 2006-2-2 c?V,a`6
* @version 1.0 }1:jM_H)k
*/ ;s9!ra:3
public class HeapSort implements SortUtil.Sort{ ;Zw!
?rk3oa-
/* (non-Javadoc) L7X._XBO[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AH`tkPd
*/ 31w?bx !Pp
public void sort(int[] data) { wW6?.}2zU
MaxHeap h=new MaxHeap(); w{I60|C]*
h.init(data); 4JU#3
for(int i=0;i h.remove(); 0}Kl47}aD
System.arraycopy(h.queue,1,data,0,data.length); }b)?o@9}:
} {Y`0}
rouD"cy
private static class MaxHeap{ +\"@2mOH{+
@2YO_rL[
void init(int[] data){ B&-;w_K
this.queue=new int[data.length+1]; v@Otp
for(int i=0;i queue[++size]=data; qW;nWfkYC
fixUp(size); >+#TsX{
} wUh'1D<(r
} \n`UkxZn+
~ Z%>N
private int size=0; Y5c( U)R8
b]hRmW
private int[] queue; Vxo3RwmR
IW6;ZDP
public int get() { }eEF/o
return queue[1]; %QwMB`x
} '9{H(DA
Kqhj=B
public void remove() { ZZ[5Z=te?
SortUtil.swap(queue,1,size--); AGLzA+6M
fixDown(1); {3_M&$jN
} zT!JHG
file://fixdown <9\_b6
private void fixDown(int k) { luat1#~J
int j; @ mtv2P`
while ((j = k << 1) <= size) { (a&.Ad0{
if (j < size %26amp;%26amp; queue[j] j++; M?)>, !Z)
if (queue[k]>queue[j]) file://不用交换 Z|'tw^0e5
break; "84.qgYaG
SortUtil.swap(queue,j,k); ?y]3kU
k = j; :S~XE
} @@SG0YxZ
} R0oP##]
private void fixUp(int k) { xqbI~jV#
while (k > 1) { He">kJx
int j = k >> 1; 4A|5eg9N
if (queue[j]>queue[k]) Yw?%>L
break; ZLE4XB]
SortUtil.swap(queue,j,k); Xa9G;J$
k = j; M;\K+,
} v,Ep2$
} xCoQ>.4p
# ?}WQP!
} 0BxO75m}o
.$99/2[90
} /SlCcozFL~
R^%7|
SortUtil： ~yB[}BPf
CFRo>G
package org.rut.util.algorithm; <Ni]\-*
;<ed1%Le,
import org.rut.util.algorithm.support.BubbleSort; :t\PYDp1
import org.rut.util.algorithm.support.HeapSort; KZ/}Iy>As
import org.rut.util.algorithm.support.ImprovedMergeSort; @-!w,$F)%d
import org.rut.util.algorithm.support.ImprovedQuickSort; 6M612
import org.rut.util.algorithm.support.InsertSort; 7v%~^l7:x
import org.rut.util.algorithm.support.MergeSort; )ae/+Q8
import org.rut.util.algorithm.support.QuickSort; crZ\:LeJ
import org.rut.util.algorithm.support.SelectionSort; - bFz
import org.rut.util.algorithm.support.ShellSort; 3<'SnP3mY
U{i9h6b"18
/** pm3?
* @author treeroot j&Z:|WniK
* @since 2006-2-2 el+euOV
* @version 1.0 ==UH)o`?8
*/ B1*%pjy
public class SortUtil { H^'*F->BA
public final static int INSERT = 1; urXM}^
public final static int BUBBLE = 2; i~ zL,/O8
public final static int SELECTION = 3; ]%shs
public final static int SHELL = 4; LB2 2doW
public final static int QUICK = 5; !C#q
public final static int IMPROVED_QUICK = 6; auL?Hb
public final static int MERGE = 7; Bv3?WW
public final static int IMPROVED_MERGE = 8; h2h$UZIv
public final static int HEAP = 9; ?z Ms;
rpDH>Hzq
public static void sort(int[] data) { mP3:Fc_G
sort(data, IMPROVED_QUICK); )M'#l<9B
} ^t9"!K
private static String[] name={ HZfcLDrO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V`@@ufU}
}; 4y%N(^
y5+-_x,
private static Sort[] impl=new Sort[]{ B6$s*SXNp
new InsertSort(), 2{@: :JZ
new BubbleSort(), )h>Cp,|{
new SelectionSort(), f[h=>O
new ShellSort(), }ndH|,
new QuickSort(), A+;]# 1y(D
new ImprovedQuickSort(), \*d@_oQ$
new MergeSort(), I?l*GO+pz
new ImprovedMergeSort(), 0+cRUH9Ew
new HeapSort() o` ,&yq.
}; kTs)u\r.
|Q.?<T:wt=
public static String toString(int algorithm){ K6!`b( v#
return name[algorithm-1]; -D{~7&
} >.J68x
/M B0%6m
public static void sort(int[] data, int algorithm) { r`28fC
impl[algorithm-1].sort(data); 1sn!!
} HTkce,dQ
.eq-i>
public static interface Sort { L-G186B$r
public void sort(int[] data); !>9*$E |
} B'atwgI0
YgdoQBQ
public static void swap(int[] data, int i, int j) { Q.M3rRh
int temp = data; <~X=6
data = data[j]; =NyzX&H6
data[j] = temp; P,D >gxl
} -[Zau$;J<
} I2K52A+