[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; {~#d_!(
} =nlj|S ~3
int i1=l; ^cuH\&&7
int i2=mid+1; Uh'W d_?
for(int cur=l;cur<=r;cur++){ >2NsBS(
if(i1==mid+1) Fzz9BEw(i
data[cur]=temp[i2++]; /bmkt@$-0
else if(i2>r) xM/WS':V
data[cur]=temp[i1++]; Y@+9Ukd/
else if(temp[i1] data[cur]=temp[i1++]; [YJ*zO
else OXZx!h
data[cur]=temp[i2++]; ScRK1
} boZ/*+t
} ;HiaX<O!
-?Cu-'
} P@Vs\wAT
}TDq7-(g
改进后的归并排序: _B\87e
U\>k>|Jr{
package org.rut.util.algorithm.support; ".?y!VY
\U'*B}Sz
import org.rut.util.algorithm.SortUtil; C}\kp0mz
6` 3kNk;
/** _:JV-lM
* @author treeroot [5Zi\'~UH)
* @since 2006-2-2 nWUau:%
* @version 1.0 epcvwM/A
*/ muO;g&
public class ImprovedMergeSort implements SortUtil.Sort { ^tVIPH.R
?28)l 4 Ml
private static final int THRESHOLD = 10; In*0.
{fMo#`9=
/* =.,XJIw&
* (non-Javadoc) :)Da^V
* @Y#TWt#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :^]FpUY
*/ ^b*ub(5Ot
public void sort(int[] data) { am/D$ (l1
int[] temp=new int[data.length]; xFyBF[c
mergeSort(data,temp,0,data.length-1); eGo$F2C6E
} 4ZB]n,pfT
f?"909&
private void mergeSort(int[] data, int[] temp, int l, int r) { H-8_&E?6m
int i, j, k; ][~rk?YY
int mid = (l + r) / 2; |^#Z!Hp_Y
if (l == r) 5e2yJ R
return; d!"gb,ec
if ((mid - l) >= THRESHOLD) mOb@w/f
mergeSort(data, temp, l, mid); /}s#
else ?:W=ddg
insertSort(data, l, mid - l + 1); d%oHcn
if ((r - mid) > THRESHOLD) (>dL
mergeSort(data, temp, mid + 1, r); 2gnz=
else Vb?_RE_H
insertSort(data, mid + 1, r - mid); 0p'g+ 2
EDg; s-T=
for (i = l; i <= mid; i++) { >,f5 5
temp = data; Ex{;&UWm
} d/E0opv
for (j = 1; j <= r - mid; j++) { &]c7<=`K"
temp[r - j + 1] = data[j + mid]; s2K8|q=
} H+Q_%%[N
int a = temp[l]; $-gRD|oY
int b = temp[r]; VC^QCuSq
for (i = l, j = r, k = l; k <= r; k++) { &cf_?4
if (a < b) { F^Mt}`O
data[k] = temp[i++]; h\8bo=
a = temp; j)}TZx4~
} else { :{?Pq8jP
data[k] = temp[j--]; ' &Nv|v\V
b = temp[j]; $ccCI \
} i^eDM.#X
} ~Yg+bwh
} ]jV1/vJ-!
u<HJFGLzI
/** [LSs|f
* @param data kb'l@d#E
* @param l D \boF+^
* @param i dkZ[~hEQG-
*/ Rtai?
private void insertSort(int[] data, int start, int len) { V}Pv}j:;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Rz33_ qA
} Fh.ZsPn,m
} `>`{DEDx{5
} EHt(!;?q
} ),0Ea~LB4
p0HcuB)Y
堆排序： d^`n/"Ice
'zuA3$SR
package org.rut.util.algorithm.support; lV?OYS|4i
"-G&]YMl
import org.rut.util.algorithm.SortUtil; i.+#a2
> !WFY
/** 3 FLht L
* @author treeroot 2O`s'&.h
* @since 2006-2-2 ;zi4W1
* @version 1.0 OPDRV\
*/ q_:B=w+bC
public class HeapSort implements SortUtil.Sort{ -J++b2R\%
EyV6uk~
/* (non-Javadoc) 1(4IcIR5T;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N'8}5Kx5
*/ ))uki*UNK
public void sort(int[] data) { 8FBXdk?A
MaxHeap h=new MaxHeap(); _"qX6Jc
h.init(data); 3L;&MG=
for(int i=0;i h.remove(); qox@_
System.arraycopy(h.queue,1,data,0,data.length); Yk5Cyq
} "R-Pe\W
=z2g}X
private static class MaxHeap{ ]ov"&,J
RaB%N$.9s
void init(int[] data){ BEii:05
this.queue=new int[data.length+1]; !:|D[1m
for(int i=0;i queue[++size]=data; S&~;l/
fixUp(size); @|9V]bk
} AkBEE
} m# I
G88g@Exk
private int size=0; "@&I*1&
YGkk"gFIA
private int[] queue; ~)!vhdBe
[1.>9ngj
public int get() { IaRq6=[
return queue[1]; 50`<[w<J q
} FdmoR;
)>WSuf j
public void remove() { %<'PSri
SortUtil.swap(queue,1,size--); N x/_+JWje
fixDown(1); fngk<$lvg
} !*=+E%7
file://fixdown 1.q a//'RW
private void fixDown(int k) { %;YERO!
int j; @4j!M1}4
while ((j = k << 1) <= size) { :JG2xtn
if (j < size %26amp;%26amp; queue[j] j++; YDiru
if (queue[k]>queue[j]) file://不用交换 hkR Jqta)
break; q=uJ^N
SortUtil.swap(queue,j,k); mV'^4by
k = j; I$1~;!<
} wfBf&Z0{
} LF_am*F
private void fixUp(int k) { N`!=z++G
while (k > 1) { X:gE mcXc
int j = k >> 1; qvN 5[rb
if (queue[j]>queue[k]) nV?e(}D
break; j*@EJ"Gm>
SortUtil.swap(queue,j,k); /Wm3qlv
k = j; 4(}V$#^+
} )Xd2qbi
} F5/,H:K\
kI#yW!
} y ;T=u(}
#6qLu
} sBWLgJz?C
gX*i"Y#
SortUtil： YDo,9
EyPF'|Qtn
package org.rut.util.algorithm; Z<6Fq*I
e(sV4Z~
import org.rut.util.algorithm.support.BubbleSort; ;PG,0R`Z;
import org.rut.util.algorithm.support.HeapSort; ~0XV[$`L
import org.rut.util.algorithm.support.ImprovedMergeSort; j?9fb
import org.rut.util.algorithm.support.ImprovedQuickSort; 4Nz]LK%@
import org.rut.util.algorithm.support.InsertSort; \J3n[6;
import org.rut.util.algorithm.support.MergeSort; @P}!mdH1
import org.rut.util.algorithm.support.QuickSort; s4Y7x.-
import org.rut.util.algorithm.support.SelectionSort; +#0,2wR#
import org.rut.util.algorithm.support.ShellSort; "r.eN_d
ao.v]6a
/** nXcOFU
* @author treeroot k6W [//
* @since 2006-2-2 ys$X!Ep
* @version 1.0 <bxp/#6D
*/ +UC-
public class SortUtil { *[[TDduh&
public final static int INSERT = 1; <)$b=z
public final static int BUBBLE = 2; 7"Iagrgw
public final static int SELECTION = 3; U4$CkTe2Y
public final static int SHELL = 4; t(?tPt4zp
public final static int QUICK = 5; 'CO3b,
public final static int IMPROVED_QUICK = 6; k=qb YGK
public final static int MERGE = 7; @+ U++
public final static int IMPROVED_MERGE = 8; yW)X asn
public final static int HEAP = 9; h"5!puN+
b py576GwA
public static void sort(int[] data) { )nJh) {4\
sort(data, IMPROVED_QUICK); (xhV>hsA
} dGBVkb4]T
private static String[] name={ >J No2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7e D<(
}; }X[wWH
ia}V8i
private static Sort[] impl=new Sort[]{ 8q#Be1u<s2
new InsertSort(), - Ado-'aaS
new BubbleSort(), YXWlg%s
new SelectionSort(), J`4{O:{4
new ShellSort(), KF4}cM=.5
new QuickSort(), V;-YM W
new ImprovedQuickSort(), gzDNMM
new MergeSort(), @G;\gJT*
new ImprovedMergeSort(), rq>OmMQ67
new HeapSort() -{'WIGm
}; wX*F'r"z
F-2&P:sjQ
public static String toString(int algorithm){ ' Zmslijf
return name[algorithm-1]; b#[7A
} @$(@64r
~)&im.Q4
public static void sort(int[] data, int algorithm) { N3}jLl/
impl[algorithm-1].sort(data); P_f^gB7
} |&]04
my^2}>wi
public static interface Sort { 5U+a{oA
public void sort(int[] data); XKq}^M&gy
} d;9F2,k$w
E\!<=
public static void swap(int[] data, int i, int j) { T=n)ea A
int temp = data; nd/.]"
data = data[j]; dNMz(~A[Y
data[j] = temp; Y"&1jud4xl
} t*'U|K4L/
} *(sUz?t