[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; Bzw19S6y
} GyK(Vb"h6
int i1=l; #Kl}= 1 4
int i2=mid+1; '%&z.{
for(int cur=l;cur<=r;cur++){ |z*>ixK
if(i1==mid+1) >Nh`rkR2[
data[cur]=temp[i2++]; (:n|v%
else if(i2>r) E30Z`$cz:
data[cur]=temp[i1++]; }LQC.!
else if(temp[i1] data[cur]=temp[i1++]; \<V)-eB
else {OP~8e"
data[cur]=temp[i2++]; y42#n
} 9@'4P
} b i~=x
F&az":
} Y{+3}drJE
G "brT5:
改进后的归并排序: q:]Q% IC^
E-SG8U;
package org.rut.util.algorithm.support; d}+W"j;
l!@ 1u^v2
import org.rut.util.algorithm.SortUtil; #U"1 9@|}
J@Yj\9U
/** gr+Pl>C{
* @author treeroot BIj
* @since 2006-2-2 wE6A 7\k%
* @version 1.0 p+Lv=e)0u
*/ Mk5RHDh
public class ImprovedMergeSort implements SortUtil.Sort { lDN?|YG
3{RL \gh$"
private static final int THRESHOLD = 10; EO:avH.*0
MGaiTN^_<
/* K*+6`z#fMF
* (non-Javadoc) L!y"d!6C
* -?fR|[\[U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `D2Mss$!
*/ 6tm\L
public void sort(int[] data) { onnugj3
int[] temp=new int[data.length]; !*vBW/
mergeSort(data,temp,0,data.length-1); B^q<2S;
} U=m=1FYaG
wOg,SMiq
private void mergeSort(int[] data, int[] temp, int l, int r) { PeNF+5s/K
int i, j, k; a+ GJVJ
int mid = (l + r) / 2; {y-`QS
if (l == r) h<NRE0-
return; ,YB1 y)x
if ((mid - l) >= THRESHOLD) A3q*$.[
mergeSort(data, temp, l, mid); Pa&4)OD
else j^EbO3
insertSort(data, l, mid - l + 1); ]w[ThHRJ
if ((r - mid) > THRESHOLD) 6fGK(r
mergeSort(data, temp, mid + 1, r); (U9a@1
else Oy$<QXj/
insertSort(data, mid + 1, r - mid); D=&K&6rr
GOVAb'
for (i = l; i <= mid; i++) { n9] ~
temp = data; W[|[;{
} DsQ/aG9c%
for (j = 1; j <= r - mid; j++) { fj+O'X
temp[r - j + 1] = data[j + mid]; ~L'nzquF
} }0{B
int a = temp[l]; E{>`MNj
int b = temp[r]; KlO(o#&N
for (i = l, j = r, k = l; k <= r; k++) { xZ+]QDKC
if (a < b) { P']Y( !L
data[k] = temp[i++]; .@k*p>K
a = temp; c#pj:f*H
} else { o;QZe&
data[k] = temp[j--]; )`Ed_F}k
b = temp[j]; ?OsS`)T
} 7zGMkl
} GAp!nix6h
} g^j7@dum
Z*eoA
/** ?D=8{!R3
* @param data p;`N\.ld
* @param l aQ|hi F}
* @param i ps+:</;Z
*/ #T"64%dX
private void insertSort(int[] data, int start, int len) { 3cThu43c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Le&;g4%
} [H^ X"D
} 968^"T#
} 9h&yuS'Yj
} N-QCfDao
sN]Z #7
堆排序： gZ`DT
CQ>]jQ,2
package org.rut.util.algorithm.support; %3G;r\|r]
U~/ID
import org.rut.util.algorithm.SortUtil; v#Upw\!
/ O)6iJ
/** voh^|(:(TH
* @author treeroot SRWg[H
* @since 2006-2-2 uV77E*+7\
* @version 1.0 ]l&'k23~p
*/ 0;cuX@A/a?
public class HeapSort implements SortUtil.Sort{ } 07r
iZC`z }
/* (non-Javadoc) 6b#~;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P` ]ps?l
*/ j_c+.iET
public void sort(int[] data) { G_(ct5:_"!
MaxHeap h=new MaxHeap(); J6auUm` `
h.init(data); #(dhBEXPW;
for(int i=0;i h.remove(); ^c'f<<z|7r
System.arraycopy(h.queue,1,data,0,data.length); !I7?
} 7d9Z/J@>
K~@`o-Z[
private static class MaxHeap{ "tX7%(
hBy*09Sv
void init(int[] data){ 0BDS_Rx
this.queue=new int[data.length+1]; 8&?p
for(int i=0;i queue[++size]=data; {(0Id!
fixUp(size); XtzOFx/
} {aIZFe}B
} 8Fx]koP.
PUKVn+h
private int size=0; JV%nH!Fs
@,Jb7V<
private int[] queue; ;qb Dbg
8]]@S"ZM,\
public int get() { .hne)K%={y
return queue[1]; KBj@V6Q
} g]4yAV<2
%I}'Vb{C
public void remove() { U!NI_uk
SortUtil.swap(queue,1,size--); @ExLh9
fixDown(1); WKOI\
} WL/5 oj
file://fixdown oX{@'B
private void fixDown(int k) { >uW^.e "F
int j; 4+I 3+a"
while ((j = k << 1) <= size) { kyu2)L2u
if (j < size %26amp;%26amp; queue[j] j++; 5\3 swP_7
if (queue[k]>queue[j]) file://不用交换 E4Zxv*
break; `GS cRhbh
SortUtil.swap(queue,j,k); '}CN?f|.
k = j; UQnBqkE
} 0<3E
} R.O
private void fixUp(int k) { [9J:bD
while (k > 1) { ?(>k,[n
int j = k >> 1; 4uPH
if (queue[j]>queue[k]) L9$&-A9ix
break; EoKo
SortUtil.swap(queue,j,k); s!aO*\[<h
k = j; zF?31\GOX
} "R8.P/ 3
} y]7%$* <
@"0uM?_)-
} @wMQC\Z
M$F{N
} Enu!u~1]F
[.ey_}X8
SortUtil： pbPz$Y
*h:D|4oJ(
package org.rut.util.algorithm; drbe#FObX
8<Xq=*J+
import org.rut.util.algorithm.support.BubbleSort; z>7=k`x`:
import org.rut.util.algorithm.support.HeapSort; ]I8]mUiUH
import org.rut.util.algorithm.support.ImprovedMergeSort; 1z3]PA!R
import org.rut.util.algorithm.support.ImprovedQuickSort; hRa\1Jt>a
import org.rut.util.algorithm.support.InsertSort; }\>+H
import org.rut.util.algorithm.support.MergeSort; pL8H8kn
import org.rut.util.algorithm.support.QuickSort; '!AT
import org.rut.util.algorithm.support.SelectionSort; }iMXXXBOT
import org.rut.util.algorithm.support.ShellSort; k~{Fnkt
O/(3 87=U
/** i},d[
* @author treeroot `|&\e_"DE
* @since 2006-2-2 gji*Wq
* @version 1.0 0e)lY='^_
*/ (x}A_i
public class SortUtil { xC'mPcU8
public final static int INSERT = 1; k]t,q$Vd
public final static int BUBBLE = 2; ]9#CVv[rq
public final static int SELECTION = 3; l},dQ4R
public final static int SHELL = 4; hH#lTye
public final static int QUICK = 5; eU`;L[
public final static int IMPROVED_QUICK = 6; )4@M`8
public final static int MERGE = 7; q)NXyy4BT
public final static int IMPROVED_MERGE = 8; =[s8q2V
public final static int HEAP = 9; *3!(*F@M,
hK Fk$A
public static void sort(int[] data) { DE'Xq6#PK
sort(data, IMPROVED_QUICK); 0,:iE\
} :2_0L
private static String[] name={ tp7oc_s?.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C?8PT/
}; O5ucI$s
m\_+)eI|
private static Sort[] impl=new Sort[]{ LFl2uV"
new InsertSort(), *@CVYJ'<
new BubbleSort(), !&qx7eOSpP
new SelectionSort(), +d.u##$
new ShellSort(), Rk}\)r\
new QuickSort(), W&HF?w}s
new ImprovedQuickSort(), 3xRM 1GgO
new MergeSort(), :b.3CL\.6
new ImprovedMergeSort(), 0Wjd-rzc,
new HeapSort() 2=jd;2~
}; @mvIt
hT.4t,wa8
public static String toString(int algorithm){ 4 U3C~J
return name[algorithm-1]; rH[5~U
} Dq{:R
8FAT(f//.
public static void sort(int[] data, int algorithm) { nUiS<D2
impl[algorithm-1].sort(data); ;+TMx(
} c$@`P
iU.!oeR?
public static interface Sort { R 4DM_u
public void sort(int[] data); AEB/8%l};v
} -kWO2
f1)HHUB
public static void swap(int[] data, int i, int j) { 5T~3$kuO
int temp = data; @<hF.4,]
data = data[j]; kJHr&=VO~
data[j] = temp; {CW1t5$*
} K4iI:
} <ED8"~_