[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; cboue LEt
} s^]F4'
int i1=l; hDp -,ag{
int i2=mid+1; WdGjvs
for(int cur=l;cur<=r;cur++){ <303PPX^6
if(i1==mid+1) 3:f<cy
data[cur]=temp[i2++]; \o-Q9V
else if(i2>r) Sxrbhnx
data[cur]=temp[i1++]; ^gwVh~j
else if(temp[i1] data[cur]=temp[i1++]; 06 kjJ4
else SEn-8ZF
data[cur]=temp[i2++]; ))" *[
} I-E}D"F;p[
} 8,BNs5
bY4~\cP.
} =rV*iLy
Ng?n}$g*
改进后的归并排序: dF2 &{D"J
5G@z l
package org.rut.util.algorithm.support; AR i_m
2,c{Z$\kn
import org.rut.util.algorithm.SortUtil; Ixhe86-:T
OXy>Tlv
/** b]v.jgD
* @author treeroot N@$g"w
* @since 2006-2-2 @'.(62v
* @version 1.0 Ctpr.
*/ 1us-ootsjP
public class ImprovedMergeSort implements SortUtil.Sort { _L mDF8Q(
8Yr_$5R
private static final int THRESHOLD = 10; zPp?D_t
@|:_?
/* 7q>WO
* (non-Javadoc) b[<zT[.:
* {{c/:FTEU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %oasIiO
*/ uXiAN#1
public void sort(int[] data) { ^YddVp
int[] temp=new int[data.length]; `A8nAgbe
mergeSort(data,temp,0,data.length-1); S}Wj+H;
} *f8;#.Re
YGP.LR7
private void mergeSort(int[] data, int[] temp, int l, int r) { Az29?|e
int i, j, k; tG(#&54
int mid = (l + r) / 2; +H5=zf2
if (l == r) 0?} ),8v>
return; }5~|h%
if ((mid - l) >= THRESHOLD) L~_3BX
mergeSort(data, temp, l, mid); `mTpL^f
else \_pP:e
insertSort(data, l, mid - l + 1); R[Q`2ggG
if ((r - mid) > THRESHOLD) vT)(#0>z
mergeSort(data, temp, mid + 1, r); "'us.t.
else @= f2\hU
insertSort(data, mid + 1, r - mid); >p4#AfGF
j(4BMk
for (i = l; i <= mid; i++) { TwBwqQ)t
temp = data; P;o6rQf
} .LDK+c
for (j = 1; j <= r - mid; j++) { cn&\q.!fh
temp[r - j + 1] = data[j + mid]; H!Gsu$C
} vzl+0"
int a = temp[l]; QXZjsa_|
int b = temp[r]; ?N2/;u>
for (i = l, j = r, k = l; k <= r; k++) { qgd#BJ=
if (a < b) { -oo&8
data[k] = temp[i++]; ".jY3<bQg
a = temp; a+!#cQl
} else { LaL.C^K
data[k] = temp[j--]; lhsd39NM
b = temp[j]; Q2sX7 cE
} PjriAlxD
} ~^*IP1.3
} aBk~/
mo1(dyjx
/** Hn"xn79nc
* @param data '<"eG!O
* @param l >[TB8
* @param i DJ?kQ
*/ zlC|Spaf
private void insertSort(int[] data, int start, int len) { a nK7j2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6'6"Ogu%'
} >5C|i-HX
} .a._WZF
} jEr/*kv
} 'V";"Ei
u/?s_OR
堆排序： 5 _X|U*+5
'^f,H1oW
package org.rut.util.algorithm.support; rblEyCR
L~N<<8?\
import org.rut.util.algorithm.SortUtil; TCAtb('D
;O=tSEe
/** a f[<[2pma
* @author treeroot 4qq+7B
* @since 2006-2-2 s)Bl1\Q
* @version 1.0 fY3^L"R
*/ wYnsd7@I
public class HeapSort implements SortUtil.Sort{ tRU+6D <w
Xq`|'6]/
/* (non-Javadoc) s5? 1w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FHpS?htRy
*/ >?iL_YTX
public void sort(int[] data) { K3jKOV8
MaxHeap h=new MaxHeap(); ab?
h.init(data); }RX[J0Prq~
for(int i=0;i h.remove(); _:oB#-0
System.arraycopy(h.queue,1,data,0,data.length); Vae}:8'}
} H8d%_jCr
%00KOM:
private static class MaxHeap{ 0M^7#),
JWhi*je
void init(int[] data){ 6Yw;@w\
this.queue=new int[data.length+1]; ;=goIsk{Q
for(int i=0;i queue[++size]=data; u0M[B7Q
fixUp(size); w"Gci~]bXU
} >Micc
} o HqBNTyH
5U)Ia>p
private int size=0; `I|$U)'
&DoYz[q
private int[] queue; !1 :%!7
V8`o71p
public int get() { ^NZq1c
return queue[1]; vmW >$P
} ?&ie;t<7
&'{6_-kh
public void remove() { Ne7HPSWiOP
SortUtil.swap(queue,1,size--); Pn:L=*
fixDown(1); sPMCN's
} 9[yW&t;#
file://fixdown cMxuG'{=.
private void fixDown(int k) { w1q-bIU
int j; O$dz=)
while ((j = k << 1) <= size) { A")F7F31c
if (j < size %26amp;%26amp; queue[j] j++; %JUD54bBt
if (queue[k]>queue[j]) file://不用交换 W&E?#=*X
break; o+{]&V->gN
SortUtil.swap(queue,j,k); -/ 5" Py
k = j; xgsEJE
} ~>8yJLZ.7
} TmI~P+5w
private void fixUp(int k) { Zy!^HS$
while (k > 1) { }>`rf{T
int j = k >> 1; h-)tWJ c
if (queue[j]>queue[k]) }<m'Nkz<X
break; )"W__U0
SortUtil.swap(queue,j,k); alr'If@7
k = j; ! @EZ
} f]c{,LFvZ
} < cNJrer
7$"{&T
} 2G=prS`s
,x(?7ZW>
} p./9^S
]7+9>V
SortUtil： d v8q&_
X*'i1)_h
package org.rut.util.algorithm; ~w Ekbq=
r.WQ6h/eZ5
import org.rut.util.algorithm.support.BubbleSort; 3MqyHOOv
import org.rut.util.algorithm.support.HeapSort; "rHcsuSEw
import org.rut.util.algorithm.support.ImprovedMergeSort; sVT:1 kI
import org.rut.util.algorithm.support.ImprovedQuickSort; utSW>
import org.rut.util.algorithm.support.InsertSort; tfz"9PV80
import org.rut.util.algorithm.support.MergeSort; l$1 ]
import org.rut.util.algorithm.support.QuickSort; eMHBY6<~=
import org.rut.util.algorithm.support.SelectionSort; qcVmt1"
import org.rut.util.algorithm.support.ShellSort; h*X5Oh6
B183h
/** &9j*Y
* @author treeroot HpCTQ\H
* @since 2006-2-2 w20)~&LE-
* @version 1.0 =lb5 #
*/ 3ncL351k
public class SortUtil { uT#4"G9A[
public final static int INSERT = 1; K;L6<a A#
public final static int BUBBLE = 2; lGhhH_
public final static int SELECTION = 3; T<ka4
public final static int SHELL = 4; xR~9|H9a
public final static int QUICK = 5; >;s!X(6b
public final static int IMPROVED_QUICK = 6; $cSmubZK
public final static int MERGE = 7; 8T523VI
public final static int IMPROVED_MERGE = 8; rbw~Ml0
public final static int HEAP = 9; +,q#'wSQG
o;[cApiQ,2
public static void sort(int[] data) { ^1w<wB\B
sort(data, IMPROVED_QUICK); TdKo"H*C
} 9O4\DRe5c
private static String[] name={ ,DIr&5>p2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QHHj.ZY
}; nvInq2T1
)u?^w
private static Sort[] impl=new Sort[]{ WupONrH1e
new InsertSort(), hd>_K*oH
new BubbleSort(), 4p6\8eytq.
new SelectionSort(), ?{]"UnyVE*
new ShellSort(), b O9PpOk+z
new QuickSort(), {>h,@
new ImprovedQuickSort(), O5v~wLx9e
new MergeSort(), Yu+;vjbK-
new ImprovedMergeSort(), 6^QSV@N|
new HeapSort() j V'~>
}; 3kJ7aBiR<
dTVh{~/
public static String toString(int algorithm){ ' JAcN@q~z
return name[algorithm-1]; ^!7|B3`
} {fxytiH8
cnL@j_mb
public static void sort(int[] data, int algorithm) { zlhU[J}"1|
impl[algorithm-1].sort(data); _edT+r>+
} Ksb55cp`
HV[*=Qi
public static interface Sort { 8,&pX ga
public void sort(int[] data); \Lz4ZZjSY
} A3A"^f$$
4<A+Tf
public static void swap(int[] data, int i, int j) { Y;1J`oT
int temp = data; BDcA_=^R&
data = data[j]; {SwvUWOf"
data[j] = temp; Senb_?
} W@WKdaJ
} &d6