[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; p7Z/%~0v:
} 0,wmEV!)
int i1=l; >/'/^h
int i2=mid+1; $9ys! <g
for(int cur=l;cur<=r;cur++){ ]Cp`qayct
if(i1==mid+1) kudXwj
data[cur]=temp[i2++]; GHFYIor
else if(i2>r) u@T,8
data[cur]=temp[i1++]; A\v]ZN4
else if(temp[i1] data[cur]=temp[i1++]; hw1J <Pl*
else Ebp=du
data[cur]=temp[i2++]; %UB+N8x`a
} yJ?=HH?
} |u.3Tp|3W
.[o`TlG%
} wu3p2#-Z
r#w.yg4EX
改进后的归并排序: :Fi$-g
_.xicov
package org.rut.util.algorithm.support; .50ql[En
?&bB?mg\
import org.rut.util.algorithm.SortUtil; ;O {"\H6
C~"b-T
/** @O8X )
* @author treeroot @DK`#,
* @since 2006-2-2 <%m$ V5h
* @version 1.0 S5e"}.]|
*/ qcoTt~\
public class ImprovedMergeSort implements SortUtil.Sort { cG5u$B
ft?c&h;At
private static final int THRESHOLD = 10; $ZRvvm!f
iu QMVtv
/* x<=R?4@rq
* (non-Javadoc) k; ned
* 8b< 'jft
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wo~;h(6
*/ '6GW.;
public void sort(int[] data) { v8>bR|n5
int[] temp=new int[data.length]; Amv:dh
mergeSort(data,temp,0,data.length-1); &e99P{\D
} _z53r+A
@k\npFKQm
private void mergeSort(int[] data, int[] temp, int l, int r) { n7L|XkaQ
int i, j, k; g])iU9)8
int mid = (l + r) / 2; r?HbApV P
if (l == r) sZ#U{LI
return; =}2k+v-B
if ((mid - l) >= THRESHOLD) _c,{}sn
mergeSort(data, temp, l, mid); j>#ywh*A
else $tDM U3,W
insertSort(data, l, mid - l + 1); ) h=[7}|
if ((r - mid) > THRESHOLD) KB8_yo{y
mergeSort(data, temp, mid + 1, r); $8>II0C.
else i)7B :uA
insertSort(data, mid + 1, r - mid); a6 w'.]m
0D&-BAzi
for (i = l; i <= mid; i++) { N 'YzCq;M
temp = data; o`{^ptu1q
} U|+c&TY
for (j = 1; j <= r - mid; j++) { UP*5M
temp[r - j + 1] = data[j + mid]; sU"sd7#A
} 7myYs7N8[
int a = temp[l]; ^IO\J{U{"x
int b = temp[r]; C%AN4Mo
for (i = l, j = r, k = l; k <= r; k++) { 8BX9JoDi
if (a < b) { ?7TuE!!M
data[k] = temp[i++]; <STE~ZmO
a = temp; ;!)gjiapw
} else { ebhV;Q.
data[k] = temp[j--]; 83_vo0@<6
b = temp[j]; =jvL2ps<
} ];\XA;aOl}
} x57O.WdN
} iO7s zi
l4\!J/df
/** t4+bRmS`_
* @param data ow*^z78M{
* @param l lA n^)EL
* @param i .qrS[ w
*/ J9lG0
private void insertSort(int[] data, int start, int len) { Z5,"KhB]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r:H.VAD
} e)aH7Jj#
} I$*LMzve
} /}nq?Vf
} i&0Zli
|N:kf&]b
堆排序： U_~r0
n7hjYNJ
package org.rut.util.algorithm.support; {VKP&{~O
gQuU_dbXSB
import org.rut.util.algorithm.SortUtil; n,Q^M$mS0
%FLe@.Ep{D
/** aEdc8i?
* @author treeroot scZ&}Ni
* @since 2006-2-2 T2 /u7<D-
* @version 1.0 ;$FMOMR
*/ QG5)mIJ
public class HeapSort implements SortUtil.Sort{ 8?h&FbmB
:b<<
/* (non-Javadoc) 6NGQU%Hd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Ryg}DOQ
*/ ;TboS-Y
public void sort(int[] data) { wc?YzXP+
MaxHeap h=new MaxHeap(); )npvy>C'(
h.init(data); !jRs5{n^Ol
for(int i=0;i h.remove(); _vUId?9@+e
System.arraycopy(h.queue,1,data,0,data.length); 4q\gFFV4
} RU\MT'E>(
l|fb;Giq=D
private static class MaxHeap{ _cd=PZhI
bP7_QYQ6
void init(int[] data){ ?y,z
this.queue=new int[data.length+1]; S&MF; E6
for(int i=0;i queue[++size]=data; E|x t\*
fixUp(size); `]5t'Ps
} z W*Z
} h3MZLPe
PF0AU T
private int size=0; ||'A9
3j/~XT
private int[] queue; U^&y*gX1
r~PVh?
public int get() { 2(25IYMS8
return queue[1]; Y >U_l:_^
} .r \g]
o| 9Mj71
public void remove() { Dj'+,{7,u
SortUtil.swap(queue,1,size--); 5wa!pR\c
fixDown(1); (XQ:f|(
} sEcg;LFp
file://fixdown )CG,Udu
private void fixDown(int k) { eI=:z/pd
int j; ~jMfm~
while ((j = k << 1) <= size) { Y9y'`}+
if (j < size %26amp;%26amp; queue[j] j++; )\QPUdOvx
if (queue[k]>queue[j]) file://不用交换 EsjZ;D,c(
break; b:W x[+
SortUtil.swap(queue,j,k); Wrs6t
k = j; \04(V'`U
} G(MLq"R6U
} !">EZX
private void fixUp(int k) { pRFlmg@/}
while (k > 1) { xGt>X77
int j = k >> 1; b*<Fi#x1=
if (queue[j]>queue[k]) k;!}nQ&
break; ?Y_!Fr3V
SortUtil.swap(queue,j,k); 3/EJ^C
k = j; %)P)Xb
} 1NQU96
} ; nYR~~
3(=QY)
} _TjRvILC
`f\+aD'u
} I4MZJAYk
}W5~89"
SortUtil： \>c1Z5H>
@~`:sa+H
package org.rut.util.algorithm; s1 (UOd7}
-[xbGSj{
import org.rut.util.algorithm.support.BubbleSort; -5<G^AS
import org.rut.util.algorithm.support.HeapSort; i#(+Kxr]>
import org.rut.util.algorithm.support.ImprovedMergeSort; ~A,(D-
import org.rut.util.algorithm.support.ImprovedQuickSort; :\"g}AX
import org.rut.util.algorithm.support.InsertSort; (n4Uc308
import org.rut.util.algorithm.support.MergeSort; {h~<!sEX
import org.rut.util.algorithm.support.QuickSort; jYnP)xX;
import org.rut.util.algorithm.support.SelectionSort; 7nk3^$|
import org.rut.util.algorithm.support.ShellSort; w! ':Ws
7!^Zsp^+
/** Fz^5cxmw
* @author treeroot T,5(JP(h3
* @since 2006-2-2 vze|*dKS
* @version 1.0 R/kfbV-b
*/ Jek3K&
public class SortUtil { ]h}O&K/
public final static int INSERT = 1; PvVn}i
public final static int BUBBLE = 2; %DuSco"
public final static int SELECTION = 3; e)A{ {wD/
public final static int SHELL = 4; apv"s+
public final static int QUICK = 5; r,cK#!<%
public final static int IMPROVED_QUICK = 6; ;Wig${
public final static int MERGE = 7; ,Zb_Pu
public final static int IMPROVED_MERGE = 8; )C%S`d<%,
public final static int HEAP = 9; ANXN.V
okLheF
public static void sort(int[] data) { uAv'%/
sort(data, IMPROVED_QUICK); yvV]|B@sO
} RbJbVFz8C
private static String[] name={ {z7kW@c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xQ\S!py-
}; y+P$}Nru
}!@X(S!do
private static Sort[] impl=new Sort[]{ 4/E>k <MA
new InsertSort(), Zksow}%
new BubbleSort(), HOlMj!.
new SelectionSort(), f4&k48Ds
new ShellSort(), Q7SRf$4
new QuickSort(), <(B: "wI
new ImprovedQuickSort(), KAm$^N5
new MergeSort(), H263<^
new ImprovedMergeSort(), <77v8=as5
new HeapSort() ]M/*Beh
}; lBfG#\rdW~
b"&1l2\ A
public static String toString(int algorithm){ 7K &j
return name[algorithm-1]; W0KSLxM
} lZ5TDS
,[)f-FmcU
public static void sort(int[] data, int algorithm) { E]%&)3O[
impl[algorithm-1].sort(data); k"J=CDP\
} JsbH'l
GM>Ms!Y
public static interface Sort { CO.e.:h
public void sort(int[] data); R4[dh.lf
} h/\/dp/tt
<!I^xo[
public static void swap(int[] data, int i, int j) { ~{BR~\D
int temp = data; Dv-ubki
data = data[j]; =-8y=
data[j] = temp; hwdZP=X
} K 6HH_T
} >d#Ks0\&