[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; d0Qd$ .%A
} W=vP]x >J
int i1=l; IrhA+)pdse
int i2=mid+1; QPg8;O
for(int cur=l;cur<=r;cur++){ fNt`?pWH
if(i1==mid+1) {~sDYRX
data[cur]=temp[i2++]; ~SF<,-Kg
else if(i2>r) I3mGo
data[cur]=temp[i1++]; lXiKY@R#
else if(temp[i1] data[cur]=temp[i1++]; P5nO78
else ]? g@jRs
data[cur]=temp[i2++]; ?_vakJ )
} 2Yn <2U/^R
} $?<Z!*x
.=;3d~.]
} tlqiXh<
-~30)J=e`
改进后的归并排序: Yc `)R
jWl)cC
package org.rut.util.algorithm.support; bc)~k:
xt%7@/hiE
import org.rut.util.algorithm.SortUtil; L3--r
l6kWQpV
/** aV?@s4
* @author treeroot ~ZEmULKkR
* @since 2006-2-2 Q[pV!CH
* @version 1.0 /bi[e9R
*/ \LppYXz
public class ImprovedMergeSort implements SortUtil.Sort { M)N?qRD
`-l6S
private static final int THRESHOLD = 10; x+x40!+\
HO%wHiv1X
/* \cUNsB5
* (non-Javadoc) PCM-i{6/
* RyK\uv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R0vIbFwj
*/ 4K\(xd&Q
public void sort(int[] data) { ]<pjXVRt"
int[] temp=new int[data.length]; m~u5kbHOi=
mergeSort(data,temp,0,data.length-1); O#k6' LN?
} S=nzw-(I
Hp|_6hO 2
private void mergeSort(int[] data, int[] temp, int l, int r) { s6zNV4
int i, j, k; `_{`l4i5
int mid = (l + r) / 2; J}+6UlD
if (l == r) "a1n_>#Fb
return; 6&l+0dq
if ((mid - l) >= THRESHOLD) rIhl.5Y
mergeSort(data, temp, l, mid); i2(1ki/|O
else s,n0jix@
insertSort(data, l, mid - l + 1); ^!z[t\$
if ((r - mid) > THRESHOLD) <$~mE9a6
mergeSort(data, temp, mid + 1, r); F\k+[`%{
else hn=[1<#^(
insertSort(data, mid + 1, r - mid); ?1$fJ3
\lC
for (i = l; i <= mid; i++) { K7W6ZH9;
temp = data; Q|L9gz[?
} I_rO!
for (j = 1; j <= r - mid; j++) { &2zq%((r
temp[r - j + 1] = data[j + mid]; uYil ?H{kH
} @u%_1
int a = temp[l]; UE ,t8j
int b = temp[r]; K7Wk6Aw
for (i = l, j = r, k = l; k <= r; k++) { o1Q7Th
if (a < b) { nMvKTH
data[k] = temp[i++]; FR!? #!
a = temp; EEZw_ 1
} else { D{4YxR PX
data[k] = temp[j--]; i21Gw41p:
b = temp[j]; E7)=`kSl
} ?0oUS+lU
} P7MeX(Tay
} $g+[yb7@
q)vplV1A
/** P*Tx14xe4
* @param data ^:* 1d \
* @param l X>. NFB
* @param i 9*=W-v
*/ {aC!~qR
private void insertSort(int[] data, int start, int len) { ' dx1x6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jDN ]3Y`
} Y.U[wL>
} z2hc.29t
} ]mXLg:3B
} }~h(w^t
] 0m&(9
堆排序： GMZv RAui
d)R352
package org.rut.util.algorithm.support; dwv6;x
=)` p_W
import org.rut.util.algorithm.SortUtil; U*P. :BvG
)){9&5,0:
/** WJ9cZL
* @author treeroot \7 NpT}dj
* @since 2006-2-2 :C8$Xi_i}
* @version 1.0 (%:>T Q(
*/ NwR}yb6
public class HeapSort implements SortUtil.Sort{ k8uvNLA)a
$<|lE/_]
/* (non-Javadoc) ? j 9|5*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iTg;7~1pY
*/ \yGsr Bl
public void sort(int[] data) { !'*csg
MaxHeap h=new MaxHeap(); @(i!YL
h.init(data); #vqo -y7@
for(int i=0;i h.remove(); yj(vkifEB
System.arraycopy(h.queue,1,data,0,data.length); h<\_XJJ
} ^+9sG$T_EV
tDCw-
private static class MaxHeap{ X*7\lf2
b2b75}_A
void init(int[] data){ ?`Y\)'}
this.queue=new int[data.length+1]; W Qc>
for(int i=0;i queue[++size]=data; 7RvUH-S[
fixUp(size); Q!FLR>8
} N9rBW
} ez9k4IO
ec|/ /
private int size=0; 9r2IuS0
R, 8s_jN
private int[] queue; 5')8r';,
iYbX
public int get() { U#o'H @
return queue[1]; !"TZ:"VZU
} Fequm+
RP`2)/sMT
public void remove() { NS,5/t
SortUtil.swap(queue,1,size--); }p9F#gr
fixDown(1); ib0g3p-Lc
} Ut)r&?
file://fixdown 9><mp]E4
private void fixDown(int k) { ?oiKVL"7
int j; AP\ofLmq
while ((j = k << 1) <= size) { cxYfZ4++m
if (j < size %26amp;%26amp; queue[j] j++; ^aRgMuU
if (queue[k]>queue[j]) file://不用交换 efuK
break; p'{xoV
SortUtil.swap(queue,j,k); gK3Mms]}m
k = j; vVs#^"-nW
} ~mN%(w!^
} 8"vwU@cfC
private void fixUp(int k) { ~L+]n0*
while (k > 1) { u; TvS |
int j = k >> 1; ;S/7 h6
if (queue[j]>queue[k]) DjW$?>
break; [ev-^[
SortUtil.swap(queue,j,k); .%0ne:5
k = j; 1:= `Y@.S
} 3An(jt$%Q
} ]5v:5:H
|[cdri^?D
} <2P7utdZ
2go>
} Z]-WFU_ N
I/UQ'xx
SortUtil： V_L[P9
G"S5ki`o
package org.rut.util.algorithm; s=EiH
\-. Tg!Q6
import org.rut.util.algorithm.support.BubbleSort; %3a|<6
import org.rut.util.algorithm.support.HeapSort; <uF [,
import org.rut.util.algorithm.support.ImprovedMergeSort; "~p+0Xws9
import org.rut.util.algorithm.support.ImprovedQuickSort; < `Z%O<X
import org.rut.util.algorithm.support.InsertSort; zd`=Ih2Wx
import org.rut.util.algorithm.support.MergeSort; h}=M^SL
import org.rut.util.algorithm.support.QuickSort; cj(X2L
import org.rut.util.algorithm.support.SelectionSort; 6d{j0?mM
import org.rut.util.algorithm.support.ShellSort; DA LQ<iF
O2H/rFx4
/** qiNliJ>40E
* @author treeroot 'H=weH
* @since 2006-2-2 xVR:; Jy[
* @version 1.0 !O\X+#j
*/ bc}dYK3$q
public class SortUtil { 1-$P0
public final static int INSERT = 1; vbn>mg5
public final static int BUBBLE = 2; )bYez
public final static int SELECTION = 3; ULvVD6RQ47
public final static int SHELL = 4; A ^B@VuK
public final static int QUICK = 5; [$2qna2VP
public final static int IMPROVED_QUICK = 6; C.E[6$oVc
public final static int MERGE = 7; DM2Q1Dh3
public final static int IMPROVED_MERGE = 8; M1uP\Sa
public final static int HEAP = 9; %}F"*.
h3h8lt_|
public static void sort(int[] data) { h[l{ 5Z*
sort(data, IMPROVED_QUICK); +(AwSh!
} P|N?OocE
private static String[] name={ b]dxlj} <
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^I./L)0=}
}; oYqE*mA
v@,XinB[
private static Sort[] impl=new Sort[]{ 6 ">oo-
new InsertSort(), 0=,'{Vz}A
new BubbleSort(), V~c(]K)-
new SelectionSort(), 8OBF^r44R
new ShellSort(), Y\>\[*.v
new QuickSort(), Nz @8
new ImprovedQuickSort(), P6E1^$e
new MergeSort(), htg'tA^CtS
new ImprovedMergeSort(), A[RN-R,
new HeapSort() *cy.*@d
}; r1hD %a
j@V$Mbv
public static String toString(int algorithm){ 9rWLE6`
return name[algorithm-1]; )x9]xqoR
} j%GbgJ
9H8=eJd
public static void sort(int[] data, int algorithm) { :28@J?jjO
impl[algorithm-1].sort(data); T/5nu?v
} aKD;1|)
K5+!(5V~
public static interface Sort { 5#BF,-Jv
public void sort(int[] data); 9`,,%vdj
} "j +v,js
o[2Y;kP3*P
public static void swap(int[] data, int i, int j) { Cea"qNq=k
int temp = data; HWOek"}Z[
data = data[j]; mf#fA2[
data[j] = temp; ~"RQ!&U
} pV_}Or_
} I@+lFG