[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; ]ZH6 .@|
} =L`PP>"rW
int i1=l; 5UX-Qqr
int i2=mid+1; Tq?f5swsI
for(int cur=l;cur<=r;cur++){ W{1l?Wo
if(i1==mid+1) 7| `_5e
data[cur]=temp[i2++]; +-rSO"nc
else if(i2>r) IsjN xBM
data[cur]=temp[i1++]; $QwzL/a
else if(temp[i1] data[cur]=temp[i1++]; cfy9wD
else (%G>TV
data[cur]=temp[i2++]; _qH]OSo
} @c}Gw;e
} 0^6}s1d_
<SdOb#2
} #c9MVQ_
b#n
改进后的归并排序: 65tsJ"a<
>fD%lq;
package org.rut.util.algorithm.support; Ex6Kxd}8
%VE FruM
import org.rut.util.algorithm.SortUtil; <3Rq!w/
q(BRJ(
/** ]deO\mB
* @author treeroot OaY]}4tI$
* @since 2006-2-2 3h6,x0AG
* @version 1.0 Jg$ NYs.xZ
*/ TN/&^/
public class ImprovedMergeSort implements SortUtil.Sort { /K;AbE
M&e=LV
private static final int THRESHOLD = 10; ony;U#^T
pP%+@;
/* WGo ryvEx
* (non-Javadoc) ?P}) Qa
* X>Z83qV5d!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I*pFX0+
*/ Z/:W.*u
public void sort(int[] data) { ?.ofs}
int[] temp=new int[data.length]; ;zSV~G6-
mergeSort(data,temp,0,data.length-1); ebLt:gGo
} waG &3m
3%u: c]-wF
private void mergeSort(int[] data, int[] temp, int l, int r) { VeH%E.:
int i, j, k; yr)e."#S
int mid = (l + r) / 2; '=d y =
if (l == r) P<9T.l
return; a, `B.I
if ((mid - l) >= THRESHOLD) RK_z!%(P
mergeSort(data, temp, l, mid); -$kbj*b##
else 9h<iw\$'
insertSort(data, l, mid - l + 1); iztgk/(+G
if ((r - mid) > THRESHOLD) !Wy&+H*0
mergeSort(data, temp, mid + 1, r); >n1UK5QD
else |=W>4>
insertSort(data, mid + 1, r - mid); [P]M)vJ**
Q[lkhx|.B
for (i = l; i <= mid; i++) { &m{~4]qWpM
temp = data; #XNURj
} "*KOU2}C
for (j = 1; j <= r - mid; j++) { knWI7
temp[r - j + 1] = data[j + mid]; i6i;{\tc
} F |_mCwA
int a = temp[l]; v'Up& /(
int b = temp[r]; z[JM ]Wy
for (i = l, j = r, k = l; k <= r; k++) { }(WUZ^L
if (a < b) { 5UQ[vHMqI
data[k] = temp[i++]; OQDx82E
a = temp; fLgHQ
} else { .SBN^fq
data[k] = temp[j--]; dhuIVBp!!e
b = temp[j]; uuy0fQQ8ti
} - @KT#
} j92+kq>Xd
} wD@ wOC
D~TK'&
/** o/!a7>xO4
* @param data C%P.`NxA
* @param l Nt[&rO3s
* @param i 0IsnG?"
*/ 54f?YR
private void insertSort(int[] data, int start, int len) { /FcwsD\=$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r?`7i'
} u;8bbv4
} U*T :p>&
} x/ P\qI
} D.h<!?E%
]`}EOS-Q
堆排序： T8vMBaU!qY
[VOw:|Tt
package org.rut.util.algorithm.support; ;bq EfV0`2
hiaTJE|J?
import org.rut.util.algorithm.SortUtil; ;kVo? W]
pf0uwXo
/** > !HC ?
* @author treeroot =gSACDTc
* @since 2006-2-2 ry4:i4/[
* @version 1.0 >*}m.'u
*/ dw7h@9\y
public class HeapSort implements SortUtil.Sort{ >k u7{1)
{1GIiP-U
/* (non-Javadoc) ";59,\6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u?8e>a
*/ puGy`9eKv1
public void sort(int[] data) { -} +PE 4fh
MaxHeap h=new MaxHeap(); !i=k=l=
h.init(data); ,Lw '3
for(int i=0;i h.remove(); Uq2Qh@B
System.arraycopy(h.queue,1,data,0,data.length); &MP8.(u `
} ~I%JVX%
P"c7h7
private static class MaxHeap{ JI92Dc*o
*Rj*%S
void init(int[] data){ hhOrO<(
this.queue=new int[data.length+1]; e#4 iue7U
for(int i=0;i queue[++size]=data; f=40_5a6
fixUp(size); H, O_l%
} kC+dQ&@g{
} v=+>ids
*\[GfTL
private int size=0; OH~I+=}.
m*TJ@gI*t
private int[] queue; [zl"G^z
PPNZ(j
public int get() { 65pC#$F<x
return queue[1]; uvGFo)9q3
} 4buzx&
QBT_H"[
public void remove() { NSAp.m
SortUtil.swap(queue,1,size--); v>mr
fixDown(1); |Oe$)(`|h
} L|w}#|-
file://fixdown MbC&u:@ "v
private void fixDown(int k) { &v_b7h
int j; {I"d"'h
while ((j = k << 1) <= size) { Jm G)=$,
if (j < size %26amp;%26amp; queue[j] j++; 5,WDmhJ
if (queue[k]>queue[j]) file://不用交换 `)eqTeW
break; C$EvcF%1
SortUtil.swap(queue,j,k); %g%#=a;]q
k = j; 9=;ETLL "
} ,u<aKae
} E+E.z?>S
private void fixUp(int k) { |Ok1E
while (k > 1) { uY=}w"Db
int j = k >> 1; 7~ok*yGw
if (queue[j]>queue[k]) `=~d^wKYJ3
break; \9dC z;
SortUtil.swap(queue,j,k); 9#niMv9
k = j; }!RFX)T
} ,LJX
} _p=O*$b.
K)t+lJ
} }))JzrqAe
C$$lJ=>
} [z`m`9Aq
}c*6|B@f
SortUtil： *HN0em
|(a<b
package org.rut.util.algorithm; pUaGrdGxzQ
AZYu/k
import org.rut.util.algorithm.support.BubbleSort; ySwvjP7f
import org.rut.util.algorithm.support.HeapSort; #N"K4@]{
import org.rut.util.algorithm.support.ImprovedMergeSort; 4]]1JL(Ka
import org.rut.util.algorithm.support.ImprovedQuickSort; DcQsdeuQ
import org.rut.util.algorithm.support.InsertSort; 'y.'Xj:l
import org.rut.util.algorithm.support.MergeSort; ^++ec>
import org.rut.util.algorithm.support.QuickSort; efF>kcIC
import org.rut.util.algorithm.support.SelectionSort; O486:tF
import org.rut.util.algorithm.support.ShellSort; *.9.BD9
X+T +y>ea
/** fhp][)g;
* @author treeroot ~;0J4hR
* @since 2006-2-2 pV^hZ.
* @version 1.0 :K_JY
*/ /xRPQ|
public class SortUtil { `P<m`*
public final static int INSERT = 1; Yj^n4G(h
public final static int BUBBLE = 2; ^g2p!7
public final static int SELECTION = 3; #b4Pn`[
public final static int SHELL = 4; @l:\Ka~TS
public final static int QUICK = 5; u;*Wc9>sU
public final static int IMPROVED_QUICK = 6; YS5Pt)?
public final static int MERGE = 7; 29E9ZjSK
public final static int IMPROVED_MERGE = 8; NPM}w!
public final static int HEAP = 9; Vee`q.
e&(Di,%:
public static void sort(int[] data) { ~h{v^}
sort(data, IMPROVED_QUICK); 3N,!y
} -\!"Kz/
private static String[] name={ +;Jb)8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v/BMzVi
}; .q1OT>
48BPo,nWR
private static Sort[] impl=new Sort[]{ xA9{o+
new InsertSort(), ,IW$XD
new BubbleSort(), cO"7wgg
new SelectionSort(), ;Qc_Tf=,
new ShellSort(), =MqefV;-
new QuickSort(), T)ra>r<#
new ImprovedQuickSort(), J34lu{'if
new MergeSort(), CKv[E
new ImprovedMergeSort(), 8*^Q#;^~99
new HeapSort() F? kW{,*
}; |8b*BnS
e8@@Pi<sB
public static String toString(int algorithm){ h@"dpmpe
return name[algorithm-1]; 6*/o
} H`$s63
Ii,Lj1Q
public static void sort(int[] data, int algorithm) { Z`5v6"Na
impl[algorithm-1].sort(data); ;m3SlP{F
} Y.qlY3iBp
+_HPZo
public static interface Sort { zF2GW
public void sort(int[] data); joh=0nk;D
} <=*xwI&q
+`==US34
public static void swap(int[] data, int i, int j) { 1B;sSp.>
int temp = data; 2rq)U+
data = data[j]; *1}'ZEaJ
data[j] = temp; 3Q`F x
} &41=YnC6
} s:UQ~p}"S