[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; M6 W{mek
} qBKRm0<W
int i1=l; 1'[RrJ$Q
int i2=mid+1; 0#AS>K5
for(int cur=l;cur<=r;cur++){ (|EnRk-E
if(i1==mid+1) ]{Ytf'bG
data[cur]=temp[i2++]; 4Y)rgLFj
else if(i2>r) NYoh6AR
data[cur]=temp[i1++]; s^@?+<4:
else if(temp[i1] data[cur]=temp[i1++]; I$Bu6x!
else &?R2zfcM
data[cur]=temp[i2++]; .S l{m[nV8
} \~]HfDu
} *oC],4y~D
QU]&q`GE
} fZqqU|tq
&p)]Cl/`
改进后的归并排序: xpWx6
X2? ^t]-N
package org.rut.util.algorithm.support; 7<<-\7`
5,I|beM
import org.rut.util.algorithm.SortUtil; [\ M$a|K
s[ ze8:
/** yM*-em
* @author treeroot @%7IZg;P6
* @since 2006-2-2 ET_a>]<mv
* @version 1.0 ?*36&Iq}
*/ ^u?#fLr
public class ImprovedMergeSort implements SortUtil.Sort { []'gIF
8!~8:?6n
private static final int THRESHOLD = 10; g[]UM;D*
H]6i1j
/* 2qw-:
* (non-Javadoc) ''{REFjK7
* vr,8i7*0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `OL@@`'^{S
*/ Xu4C*]A>
public void sort(int[] data) { dr|>P*
int[] temp=new int[data.length]; B}PT-S1l
mergeSort(data,temp,0,data.length-1); "$->nC.
} wxa?.
kYlsjM
private void mergeSort(int[] data, int[] temp, int l, int r) { 0pO{{F
int i, j, k; T<hS
int mid = (l + r) / 2; qqL :#]lV5
if (l == r) #JmVq-)
return; CFm( yFk
if ((mid - l) >= THRESHOLD) q&/<~RC*
mergeSort(data, temp, l, mid); D5o[z:V7"
else S>-x<'Os
insertSort(data, l, mid - l + 1); mv5=>Xc6
if ((r - mid) > THRESHOLD) +VJS/
mergeSort(data, temp, mid + 1, r); laRcEXj
else #Tz$ona
insertSort(data, mid + 1, r - mid); 4pvT?s>68
w\"~*(M
for (i = l; i <= mid; i++) { -C]k YQ
temp = data; #41xzN
} 9O8na 'w
for (j = 1; j <= r - mid; j++) { @/MI Oxg[
temp[r - j + 1] = data[j + mid]; /6=IL
} UZ5O%SF
int a = temp[l]; skd3E4
int b = temp[r]; Q[j'FtP%
for (i = l, j = r, k = l; k <= r; k++) { -B`Nkc
if (a < b) { scf.>K2
data[k] = temp[i++]; (E{>L).~
a = temp; WH>=*\
} else { <G};`}$a
data[k] = temp[j--]; U$*AV<{%
b = temp[j]; Jy#c 6
} dRdI('
} wzXIEWJ
} ?QDHEC62
y*F !k{P
/** wbIgZ]o!/;
* @param data JPH! .@
* @param l <r9L-4
* @param i 9J3@8h p
*/ 4YuJ-
private void insertSort(int[] data, int start, int len) { !lVOZ%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^(j}'p,
} mY1I{'.
} x7<2K(
} .wU0F
} *~D|M
|rU?
堆排序： CPW^pGT+i
2)~`.CD?L
package org.rut.util.algorithm.support; M_I.Y1|
Bi.,@7|>
import org.rut.util.algorithm.SortUtil; j8cIpbp8x
^n|yfvR
/** 3X;k c>
* @author treeroot !^yH]v
* @since 2006-2-2 <y S|\Z|
* @version 1.0 ^n?`l ^9c$
*/ =JkPE2mU
public class HeapSort implements SortUtil.Sort{ diz=|g=w
Wbq0K6X
/* (non-Javadoc) 5*O*p `Ba
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L@5j? N?F
*/ t)4><22of
public void sort(int[] data) { ?XlPKY
MaxHeap h=new MaxHeap(); %.h&W;
h.init(data); JdM0f!3
for(int i=0;i h.remove(); rAn:hR{
System.arraycopy(h.queue,1,data,0,data.length); +]3kcm7B
} _xefFy
'mELW)S
private static class MaxHeap{ Hk1[0)
O"M2*qiH
void init(int[] data){ >\7Mf@c
this.queue=new int[data.length+1]; V&h{a8xa$
for(int i=0;i queue[++size]=data; *8bj3A]vf
fixUp(size); VMee"'08
} 2q NA\-0i>
} [.(,vn?6
|JL?"cc
private int size=0; ^ Fnag]qQ
Ka_g3
private int[] queue; S4_C8
gkM Q=;Nn
public int get() { $} @gR] Z
return queue[1]; :R{pV7<O
} kR+7JUq]
6!`GUU
public void remove() { n)Zu>
SortUtil.swap(queue,1,size--); YMU2^,3
fixDown(1); %/4_|.8u
} ]vflx^<?
file://fixdown xZ]QT3U+
private void fixDown(int k) { Yyr qO^9m
int j; k-N}tk/5
while ((j = k << 1) <= size) { y;if+
if (j < size %26amp;%26amp; queue[j] j++; IAHQT<]
if (queue[k]>queue[j]) file://不用交换 Hl#?#A5
break; T,oZaJ<
SortUtil.swap(queue,j,k); Nz77" kC
k = j; dq{+-XaEk
} 7>E>`Nc6
} GGs7]mhA
private void fixUp(int k) { @<jm+f"MP
while (k > 1) { j"A<qI
int j = k >> 1; rJTYCe1*
if (queue[j]>queue[k]) `-!kqJ
break; I7#^'/
SortUtil.swap(queue,j,k); 3xz|d`A
k = j; *EwDwS$$
} .k-t5d
} Xw#"?B(M]
b['v0x
} noso* K7
vdcPpj^d5
} B k*Rz4Oa
=.qX u+
SortUtil： -@tj0OHg
Sy/Z}H
package org.rut.util.algorithm; *3KSOcQ
rEMe=>^
import org.rut.util.algorithm.support.BubbleSort; OQIr"
import org.rut.util.algorithm.support.HeapSort; %L|xmx!c
import org.rut.util.algorithm.support.ImprovedMergeSort; 6)PnzeYW
import org.rut.util.algorithm.support.ImprovedQuickSort; vqAEF^HYry
import org.rut.util.algorithm.support.InsertSort; js9^~:Tw
import org.rut.util.algorithm.support.MergeSort; PfsUe,*
import org.rut.util.algorithm.support.QuickSort; @6 a'p
import org.rut.util.algorithm.support.SelectionSort; :}R,a=N
import org.rut.util.algorithm.support.ShellSort; y=aWSb2y'
e*yl_iW
/** gN2oUbf8
* @author treeroot @uz(h'~
* @since 2006-2-2 s f.z(o
* @version 1.0 lNsdbyV'
*/ )$GCur~
public class SortUtil { Cw"[$E'J
public final static int INSERT = 1; I)kc[/^j$
public final static int BUBBLE = 2; =A*a9c2
public final static int SELECTION = 3; N^M6*,F,J
public final static int SHELL = 4; 1%C EUE
public final static int QUICK = 5; {r~=mQ
public final static int IMPROVED_QUICK = 6; ?t<g|H/|6
public final static int MERGE = 7; Na4O( d`
public final static int IMPROVED_MERGE = 8; lCgzQZ
public final static int HEAP = 9; yk'L_M(=
N4z[=b>
public static void sort(int[] data) { Peo-t*-06
sort(data, IMPROVED_QUICK); L]%!YP\<T
} ORM3oucP
private static String[] name={ ~"_!O+Pj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C23p1%#1
}; Vh1y]#w
$@vB<(sk
private static Sort[] impl=new Sort[]{ 052Cf dq
new InsertSort(), ~ MsHV%
new BubbleSort(), !RPE-S
new SelectionSort(), Vc;g$Xr[
new ShellSort(), M~7Cb>%<
new QuickSort(), VC0Tqk
new ImprovedQuickSort(), "UreV
new MergeSort(), Ke:WlDf
new ImprovedMergeSort(), KLW>O_+
new HeapSort() +_kA&Q(t
}; V7}'g6X
c&P/v#U_
public static String toString(int algorithm){ 1V9AnzwX
return name[algorithm-1]; E=CAWj\
} MkHkM
JS/ChoU
public static void sort(int[] data, int algorithm) { lo1bj*Y2
impl[algorithm-1].sort(data); EP"Z58&$R
} op/_:#&'
^eyVEN
public static interface Sort { OSfT\8YA
public void sort(int[] data); ,(-V<>/*.|
} ~1E!Co
.jg@UAK
public static void swap(int[] data, int i, int j) { 3~7!=s\v
int temp = data; EJ>rW(s
data = data[j]; @/?i|!6
data[j] = temp; b`$qKO
} B'Jf&v
} {* :^K\-