[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; M])ZK
} )W|w C#
int i1=l; 6.FY0.i
int i2=mid+1; MU>k,:[
for(int cur=l;cur<=r;cur++){ ::o lN
if(i1==mid+1) _t:$XJ`bTk
data[cur]=temp[i2++]; 6L:x^bM
else if(i2>r) J`^ag'
data[cur]=temp[i1++]; 2C2fGYu
else if(temp[i1] data[cur]=temp[i1++]; ,9?BcD1
else <DpevoF
data[cur]=temp[i2++]; >PB4L_1
} <CRP^_c
} QU#w%|
d^/3('H6
} -HQQw$
z,|r*\dw
改进后的归并排序: bAsYv*t%r
:s=NUw_^
package org.rut.util.algorithm.support; .ELGWF`>
UsgK
import org.rut.util.algorithm.SortUtil; ()`7L|(`;q
X(!Cfb8+5
/** KgV3j]d
* @author treeroot ]d55m/(
* @since 2006-2-2 2*rH?dz8E
* @version 1.0 >O1[:%Z1
*/ g$n7CXoT
public class ImprovedMergeSort implements SortUtil.Sort { ^F>cp ,x
k-Q%.o
private static final int THRESHOLD = 10; ot@|!V
4B=2>k
/* sfLMkE
* (non-Javadoc) Yaj0;Lo[wt
* INUG*JC6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =b38(\
*/ U0=]
public void sort(int[] data) { U93}-){m
int[] temp=new int[data.length]; ygOd69
mergeSort(data,temp,0,data.length-1); l;af~ef)'
} Ok>gh2e[c
AoY-\E
private void mergeSort(int[] data, int[] temp, int l, int r) { X7[^s $VK
int i, j, k; YNYx>Ue
int mid = (l + r) / 2; og4UhP^UET
if (l == r) ?MXejEC
return; .id)VF-l
if ((mid - l) >= THRESHOLD) NxSu3e~PS
mergeSort(data, temp, l, mid); +U_=*"@|
else *+'x~a
insertSort(data, l, mid - l + 1); C?ulj9=Z
if ((r - mid) > THRESHOLD) 3Uqr,0$p
mergeSort(data, temp, mid + 1, r); (]_1
else 6cpw~
insertSort(data, mid + 1, r - mid); ^?$WVB
0- ><q
for (i = l; i <= mid; i++) { (Lo%9HZ1Mx
temp = data; b:=TB0Fx?n
} rI^zB mrr
for (j = 1; j <= r - mid; j++) { r~+\ Y"rM
temp[r - j + 1] = data[j + mid]; |\_^B
} [qdRUV'
int a = temp[l]; kR]!Vr*yh
int b = temp[r]; 0_k'.5l%
for (i = l, j = r, k = l; k <= r; k++) { &GNxo$CG
if (a < b) { v4?x.I
data[k] = temp[i++]; Jwj%_<
a = temp; np%\&CVhN
} else { y+!+ D[x
data[k] = temp[j--]; JBZUv
b = temp[j]; 9V,!R{kO!
} :*t"8;O[
} BQBeo&n6
} RE}?5XHb
: m)
/** ii%+jdi.
* @param data i.=w]S j
* @param l iP@ZM=&wz
* @param i wx\v:A
*/ Z?pnj8h-&
private void insertSort(int[] data, int start, int len) { _tSAI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 76>7=#m0u'
} [v$0[IuY,
} #BJG9DFP4`
} p>vn7;s2#
} I96Ci2)m
!h(|\" }
堆排序： \(VTt|}By$
bfA=3S"0
package org.rut.util.algorithm.support; _FXZm50\g{
]E_h
import org.rut.util.algorithm.SortUtil; <WjF*x p
Vm5c+;
/** Qd=^S^}(
* @author treeroot V?Z.\~
* @since 2006-2-2 OS4q5;1#
* @version 1.0 ?I/qE='*
*/ z>jUR,!GT
public class HeapSort implements SortUtil.Sort{ }K1JU`Lz
T|6jGZS^|W
/* (non-Javadoc) {D?50Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bKj%s@x
*/ DVah
public void sort(int[] data) { AgOp.~*Z~V
MaxHeap h=new MaxHeap(); 5~Cakd]>
h.init(data); I#m-g-J
for(int i=0;i h.remove(); Y7#-Fra0W
System.arraycopy(h.queue,1,data,0,data.length); WX}xmtLs
} uum;q-"
F.-R r
private static class MaxHeap{ lE!a
GM<BO8Y.
void init(int[] data){ @mE)|.f
this.queue=new int[data.length+1]; af#pR&4}
for(int i=0;i queue[++size]=data; #Y0-BYa^
fixUp(size); %uJ<M-@r=u
} `6 /$M!4$
} XO-Prs
u$*56y
private int size=0; fGw^:,B
B;R.#^@/
private int[] queue; =`*O1a
chV9_(8
public int get() { 6el;Erp
return queue[1]; fMGbODAvY
} cE`6uq7p
&FH2fMLQ
public void remove() { 9R;/*$
SortUtil.swap(queue,1,size--); {o!KhF:[
fixDown(1); NZP.0coY
} w?zKjqza=v
file://fixdown 56e r`=ms
private void fixDown(int k) { ~/8M 3k/
int j; 4(Ov1a>
while ((j = k << 1) <= size) { .!1S[
if (j < size %26amp;%26amp; queue[j] j++; G2]4n T
if (queue[k]>queue[j]) file://不用交换 Z|_K6v/c
break; oY1';&BO9
SortUtil.swap(queue,j,k); rj6tZJZ#o0
k = j; Ma'_e=+A
} c9kzOQ2n
} 2pzF5h
private void fixUp(int k) { 'fcMuBc+4
while (k > 1) { "Fy7K#n
int j = k >> 1; 0O\SU"bP
if (queue[j]>queue[k]) ZDD..j
break; WVmq% ,7
SortUtil.swap(queue,j,k); ddfs8\
k = j; u)ev{)$TM
} )I^2k4Cg"
} Nc:({@I
({-GOw46
} !).}u,*'no
(RUT{)p[
} +2K:qvzZ
"V>R9dO{"!
SortUtil： Cw~RJ^a_
cTXri8K_
package org.rut.util.algorithm; `((Yc]:7
G0`h%
import org.rut.util.algorithm.support.BubbleSort; #l4)HV
import org.rut.util.algorithm.support.HeapSort; jn%!AH
import org.rut.util.algorithm.support.ImprovedMergeSort; ot`%*
import org.rut.util.algorithm.support.ImprovedQuickSort; !@x+q)2
import org.rut.util.algorithm.support.InsertSort; FuUD 61JHY
import org.rut.util.algorithm.support.MergeSort; 6*qL[m.F[o
import org.rut.util.algorithm.support.QuickSort; y kW [B
import org.rut.util.algorithm.support.SelectionSort; :9R=]#uD
import org.rut.util.algorithm.support.ShellSort; a@@M+9Q
p}|.ZkyN
/** @WQK>-=(3
* @author treeroot G [:N0{v5
* @since 2006-2-2 |y h\
* @version 1.0 xXY.AoO6
*/ }R)=S_j
public class SortUtil { i.xXb[M+
public final static int INSERT = 1; $xOI 1|d
public final static int BUBBLE = 2; 9%iUG(DC
public final static int SELECTION = 3; `C_jP|[e
public final static int SHELL = 4; BnCKSg7V
public final static int QUICK = 5; ed!:/+3e/
public final static int IMPROVED_QUICK = 6; zF@o2<cD@
public final static int MERGE = 7; <W`#gn0b6
public final static int IMPROVED_MERGE = 8; :d0Y%vl
public final static int HEAP = 9; /wxE1][.
hY*0aZ|(
public static void sort(int[] data) { &n[~!%(
sort(data, IMPROVED_QUICK); i\4hR?
} Cv>o.Bp|
private static String[] name={ iweD @b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'S<%Xm
}; L>!8YUz7p$
TDg@Tg0
private static Sort[] impl=new Sort[]{ u>Rb ?`
new InsertSort(), 'lo
new BubbleSort(), o7TN,([W
new SelectionSort(), RQkyCAGx
new ShellSort(), ~XydQJ^*
new QuickSort(), 9D 0dg(
new ImprovedQuickSort(), -UZ@G~K
new MergeSort(), ]&ixhW
new ImprovedMergeSort(), 7QVuc!V
new HeapSort() Uz608u
}; R7s|`\
4"@GNk~e
public static String toString(int algorithm){ x lsqj`=
return name[algorithm-1]; 4g}FB+[u
} ZkP{[^6d\
BR v+.(S
public static void sort(int[] data, int algorithm) { )i>[M"7
impl[algorithm-1].sort(data); &3v&i*DG,I
} =H %-.m'f2
FG%j{_Ez
public static interface Sort { 1[E#vdbT
public void sort(int[] data); 4Hb $0l
} aup6?'G;
dI*'!wK
public static void swap(int[] data, int i, int j) { DY{cQb
int temp = data; g7CXlT0Q6
data = data[j]; W%e_~$H0
data[j] = temp; Sf/q2/r?6[
} x|0:P sE
} #5&jt@NS