[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; o99 a=x6
} zKutx6=aj
int i1=l; 51,m^veO
int i2=mid+1; ,]Ma,2
for(int cur=l;cur<=r;cur++){ dkLR Q
if(i1==mid+1) *,pqpD>
data[cur]=temp[i2++]; :h3JDQe:.
else if(i2>r) xVe!
data[cur]=temp[i1++]; CMr`n8M
else if(temp[i1] data[cur]=temp[i1++]; B::?
else "osYw\unI
data[cur]=temp[i2++]; '8JaD6W9S
} 'YeJGzsJp
} TGLXvP& \
re!CF8 q
} QHh#O+by#
~h/U ;Da
改进后的归并排序: UGMdWq
gkdjH8(2
package org.rut.util.algorithm.support; o(zg_!P
r__M1 !3
import org.rut.util.algorithm.SortUtil; %Fv)$ :b
#?*jdN:
/** #n"/9%35f`
* @author treeroot ?xet:#R'
* @since 2006-2-2 Txh;r.1e
* @version 1.0 S!]}}fKEFm
*/ 3:(`#YY
public class ImprovedMergeSort implements SortUtil.Sort { /$=^0v+
zyr6Tv61U
private static final int THRESHOLD = 10; U&XoT-p$L
KOQTvJ_#
/* V_pBM
* (non-Javadoc) /b|sv$BN
* &M!:,B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "mf;k^sqS
*/ i&$uG[&P
public void sort(int[] data) { #o RUH8
int[] temp=new int[data.length]; ;D1IhDC
mergeSort(data,temp,0,data.length-1); +\%zy=
} f/x "yUq
1 W u
private void mergeSort(int[] data, int[] temp, int l, int r) { D/WS
int i, j, k; {JgN^R<5<f
int mid = (l + r) / 2; OOCeZ3yF(
if (l == r) &}cie"\L
return; DbN'b(+
if ((mid - l) >= THRESHOLD) Q [{vU
mergeSort(data, temp, l, mid); F*4+7$E0B
else 1|VJND
insertSort(data, l, mid - l + 1); NP8TF*5V
if ((r - mid) > THRESHOLD) /HRaX!|E#
mergeSort(data, temp, mid + 1, r); x_K%
else ~#CCRUhM
insertSort(data, mid + 1, r - mid); J (h>
1GdD
for (i = l; i <= mid; i++) { l_c?q"X
temp = data; lu_Gr=#O
} 5o/rV.I
for (j = 1; j <= r - mid; j++) { Jy_'(hG
temp[r - j + 1] = data[j + mid]; m"R(_E5
} g8Z14'Ke
int a = temp[l]; 4lA+V,#
int b = temp[r]; o[#a}5Y
for (i = l, j = r, k = l; k <= r; k++) { >gl.(b25C
if (a < b) { `cpcO
data[k] = temp[i++]; ja/[PHq"
a = temp; MlFvDy
} else { jGn^<T\
data[k] = temp[j--]; nlW&(cH
b = temp[j]; 0,/x#
} &iZYBa
} kdCOcJB
} {P&^Erx
o2
/** wY#mL1dF
* @param data Bv8C_-lV/
* @param l VaxO L61xE
* @param i __j8jEV
*/ nY)Pxahm7
private void insertSort(int[] data, int start, int len) { `Tj}4f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3;NRW+
} 7VcVI? ?
} n^N]iw{G
} M-N2>i#
} +`8)U3u0
"N]o5d
堆排序： wVDB?gy%#
: qRT9n$
package org.rut.util.algorithm.support; P~e$iBH'
dU6LB+A
import org.rut.util.algorithm.SortUtil; I0K!Kcu5Iu
09Y?!,
/** |@.<}/
* @author treeroot p8l#=]\;
* @since 2006-2-2 L?x?+HPY.
* @version 1.0 Z@!W?Ed
*/ I&8m5F?$`
public class HeapSort implements SortUtil.Sort{ I})t
2<Bv=B
/* (non-Javadoc) cg00t+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t[hocl/6
*/ on?/tHys
public void sort(int[] data) { +E|ouFI
MaxHeap h=new MaxHeap(); /T[ICd2J
h.init(data); CDj Dhs
for(int i=0;i h.remove(); e"#D){k#
System.arraycopy(h.queue,1,data,0,data.length); 4Z9wzQ>
} ~+C?][T
8"mW!M
private static class MaxHeap{ D^55:\4(
W"(`n4hi3
void init(int[] data){ pm~;:#z7
this.queue=new int[data.length+1]; N+qLxk
for(int i=0;i queue[++size]=data; "H<#91^|
fixUp(size); yB%)D0
} p"IS"k%
} D|j\ nQ
u3mT l
private int size=0; bs EpET
W'h0Zg
private int[] queue; S.|kg2
AYIz;BmWy
public int get() { <[:7#Yo g
return queue[1]; 2pa3}6P+
} d`uO7jlm
v9m;vWp
public void remove() { +\GZ(!~
SortUtil.swap(queue,1,size--); lk1Gs{(qhH
fixDown(1); @B[Cc`IN"
} l/zC##1+.
file://fixdown P<!$A
private void fixDown(int k) { (%yc5+f!
int j; !]+Z%ed`%
while ((j = k << 1) <= size) { 5!jNL~M
if (j < size %26amp;%26amp; queue[j] j++; 6F.7Ws<
if (queue[k]>queue[j]) file://不用交换 nDB 2>J
break; 1]Q2qs
SortUtil.swap(queue,j,k); #0hNk%X=
k = j; "%''k~UD4
} &4&33D
} .#55u+d,
private void fixUp(int k) { ywynx<Wg
while (k > 1) { Kt,ynA
int j = k >> 1; 34wM%@D*c
if (queue[j]>queue[k]) t-*|Hfp*^
break; s^YTI\L \
SortUtil.swap(queue,j,k); q%k(M[
k = j; a`b zFu{
} RE $3| z
} |W*@}D
%=9yzIjbAt
} 5%?b5(mnD
GyAgPz
} o.3YM.B#
]]=fA 4(
SortUtil： XL PpxG
?Wg{oB@(
package org.rut.util.algorithm; *UBP]w
}"?nU4q;S
import org.rut.util.algorithm.support.BubbleSort; Zxc7nLKF~
import org.rut.util.algorithm.support.HeapSort; (s$u_aq77
import org.rut.util.algorithm.support.ImprovedMergeSort; ? x"HX|n
import org.rut.util.algorithm.support.ImprovedQuickSort; !@<@QG-
import org.rut.util.algorithm.support.InsertSort; [Z5[~gP3
import org.rut.util.algorithm.support.MergeSort; -9>LvLU
import org.rut.util.algorithm.support.QuickSort; dG-or
import org.rut.util.algorithm.support.SelectionSort; XQ3*
import org.rut.util.algorithm.support.ShellSort; Np<&#s[dQ
ur<eew@8@i
/** 6Z&u
* @author treeroot ]osx.
* @since 2006-2-2 ]TBtLU3
* @version 1.0 o9Txo (tYU
*/ YYE8/\+B.
public class SortUtil { Z@,PZ
public final static int INSERT = 1; WVWS7N\
public final static int BUBBLE = 2; n(1wdlEp
public final static int SELECTION = 3; qfGtUkSSb
public final static int SHELL = 4; 6`qr:.
public final static int QUICK = 5; Q:kVCm/;
public final static int IMPROVED_QUICK = 6; i&pJg1
public final static int MERGE = 7; 6b]1d04hT
public final static int IMPROVED_MERGE = 8; ZEj!jWP2m
public final static int HEAP = 9; /MKNv'5&!%
_+\:OB[Y
public static void sort(int[] data) { ,9Z2cgXwJ
sort(data, IMPROVED_QUICK); nx-1*
} O~h94 B`
private static String[] name={ (D>y6r>r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XpgV09.EE
}; | 7 m5P@X
dv'E:R(a
private static Sort[] impl=new Sort[]{ =@JS88+
new InsertSort(), n</k/Mk}
new BubbleSort(), qcTmsMpj
new SelectionSort(), c.(Ud`jc
new ShellSort(), ZD)0P=%
new QuickSort(), J3~hzgY
new ImprovedQuickSort(), ,](v?v.[4
new MergeSort(), Jh$"fr3
new ImprovedMergeSort(), F)/~p&H
new HeapSort() 1Y=AT!"V
}; ',sQ/#S
xvR?~
public static String toString(int algorithm){ z1f^p7$M?
return name[algorithm-1]; <TR/ `
} my ;
ik2- OM
public static void sort(int[] data, int algorithm) { &[5n0e[
impl[algorithm-1].sort(data); `RL,ZoYuu
} 8 "_Bq
V$dJmKg
public static interface Sort { G@!_ZM8h
public void sort(int[] data); g\o{}Q%X
} .-SF$U_P*a
N7*CP|?E
public static void swap(int[] data, int i, int j) { .pM &jni Y
int temp = data; Z 7s;F}=
data = data[j]; 3@^>#U
data[j] = temp; hNgpp-
} -DP8NTl"
} Gla@l<