[JAVA]用Java实现的各种排序

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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; f*xv#G
} :YX5%6
int i1=l; iN0'/)ar
int i2=mid+1; fV6ddh
for(int cur=l;cur<=r;cur++){ 'F/uD1;
if(i1==mid+1) e=#D1
data[cur]=temp[i2++]; lc [)Ev
else if(i2>r) p,(W?.ZDN?
data[cur]=temp[i1++]; c*R\fQd
else if(temp[i1] data[cur]=temp[i1++]; Ed-3-vJej6
else h~._R6y
data[cur]=temp[i2++]; I;?PDhDb
} nHF~a?|FT
} e6 <9`Xg
!"E/6z2&(k
} |RXXj[z
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改进后的归并排序: 2zv:j7
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package org.rut.util.algorithm.support; heWQPM|s
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import org.rut.util.algorithm.SortUtil; Ne3YhCC>
tK#/S+l
/** F]<2nb7
* @author treeroot y>T>
* @since 2006-2-2 IQd~` G
* @version 1.0 Tgla_sMb
*/ MU '-
public class ImprovedMergeSort implements SortUtil.Sort { ,@M<O!%Cs
r/)ZKO,
private static final int THRESHOLD = 10; Azr|cKu]
d}|z+D
/* T>hm\!
* (non-Javadoc) XW2ZQMos1
* 5xj8^W^G9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "So"oT1
*/ (?GW/pLK]
public void sort(int[] data) { 1BP/,d |+
int[] temp=new int[data.length]; sS4V(:3s
mergeSort(data,temp,0,data.length-1); 3=Uyt
} 2o1WXE %$
Q$k#q<+0
private void mergeSort(int[] data, int[] temp, int l, int r) { =E(ed,gH8
int i, j, k; oSYbx:2wo
int mid = (l + r) / 2; jlqSw4_
if (l == r) MIiBNNURX
return; Z@*!0~NH=4
if ((mid - l) >= THRESHOLD) tef>Py
mergeSort(data, temp, l, mid); !4Sd^"
else ;v.J D7
insertSort(data, l, mid - l + 1); r%$\Na''
if ((r - mid) > THRESHOLD) #3RElI
mergeSort(data, temp, mid + 1, r); (WY9EJ<s,
else v:w^$]4
insertSort(data, mid + 1, r - mid); NMC0y|G
'0o^T 7C
for (i = l; i <= mid; i++) { t0/Ol'kgs
temp = data; cBOt=vg,5
} 4? rEO(SZ
for (j = 1; j <= r - mid; j++) { 1M55!b
temp[r - j + 1] = data[j + mid]; :v$)Z~
} ,iZKw8]f
int a = temp[l]; d{B0a1P
int b = temp[r]; bcxR7<T,"9
for (i = l, j = r, k = l; k <= r; k++) { t56PzT'M
if (a < b) { {%&04yq+
data[k] = temp[i++]; S<i.O
a = temp; 2#/sIu-L
} else { 4+p1`
data[k] = temp[j--]; ^q%f~m,O<
b = temp[j]; nYvkeT
} Lm1JiPs d
} _)YB*z5
} U17=/E
J*6B~)Sp@
/** XgeUS;qtta
* @param data 7xWJw
* @param l `fG<iBD
* @param i :2wT)wz
*/ *1:kIi7_
private void insertSort(int[] data, int start, int len) { Q]RE,ZZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DFRgn
} id`RscV]
} >f1fvv6
} `JGW8 _
} jzWgyI1b
#~qzaETv,
堆排序： fwUF5Y
Zz'g&ewo
package org.rut.util.algorithm.support; `/i/AZ{
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import org.rut.util.algorithm.SortUtil; 1L?W+zMO
8A-*MU`+
/** 9.#")%_p
* @author treeroot J^PFhu
* @since 2006-2-2 R;&k/v
* @version 1.0 fI=p^k:
*/ Mdp'u$^!
public class HeapSort implements SortUtil.Sort{ E4.A$/s8[
['iEw!
/* (non-Javadoc) x[+bLlb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ruwp"T}mF
*/ zh(=kS`
public void sort(int[] data) { YOvhMi
MaxHeap h=new MaxHeap(); 2jkma :$'
h.init(data); a`eb9o#
for(int i=0;i h.remove(); l>(*bb1}b
System.arraycopy(h.queue,1,data,0,data.length); bhsCeH
} 4TiHh
]ZI@?H? O
private static class MaxHeap{ l!\~T"-7;:
)?LZg<<
void init(int[] data){ wCj)@3F
this.queue=new int[data.length+1]; Lso%1M
for(int i=0;i queue[++size]=data; mW,b#'hy
fixUp(size); Aq>?G+
} /h]ru SI
} C?<-`$0
y T&#k1
private int size=0; z 61Fq
REsw=P!b
private int[] queue; G"6XJYoI
Vk[M .=J
public int get() { `v2Xp3o4f
return queue[1]; qIh9? |`U
} `ah"Q;d$
N6%L4v8-}X
public void remove() { cBZJ
SortUtil.swap(queue,1,size--); 3+iryW(\
fixDown(1); *Aug7 HlS
} p^ OHLT
file://fixdown N'pYz0_H
private void fixDown(int k) { Ahr
int j; hb}QtQ
while ((j = k << 1) <= size) { - _%~b
if (j < size %26amp;%26amp; queue[j] j++; 'jye*
if (queue[k]>queue[j]) file://不用交换 :<5jlpV(
break; <HpUP!q8v
SortUtil.swap(queue,j,k); Ufor>
k = j; t"MrrK>T
} ;Uy}(
} r-]%R:U*
private void fixUp(int k) { w:=:D=xH2
while (k > 1) { ={o)82LV
int j = k >> 1; lB#7j
if (queue[j]>queue[k]) 5as5{"l
break; 'cc{sjG
SortUtil.swap(queue,j,k); "\5 T 6
k = j; GsiKL4|mj
} h1f 05
} HoeW6UV
T;S6<J
} ]kO|kIs
VAqZ`y
} 1vJj?Uqc
2j]uB0
SortUtil： h$%h w+"4
Ya!PV&"Z
package org.rut.util.algorithm; 'tX}6wurf
mSk";UCn
import org.rut.util.algorithm.support.BubbleSort; 8-@HzS%
import org.rut.util.algorithm.support.HeapSort; G%K&f1q%
import org.rut.util.algorithm.support.ImprovedMergeSort; xNLgcb@v>
import org.rut.util.algorithm.support.ImprovedQuickSort; q:vGGK^
import org.rut.util.algorithm.support.InsertSort; wZKmU
import org.rut.util.algorithm.support.MergeSort; f*p=j(sF
import org.rut.util.algorithm.support.QuickSort; ,;<M+V3+
import org.rut.util.algorithm.support.SelectionSort; HJlxpX$_
import org.rut.util.algorithm.support.ShellSort; _|;{{8*?
w`dSc@ :
/** 7>AMzNj
* @author treeroot D^f;X.Qm
* @since 2006-2-2 f=8{cK0j
* @version 1.0 4VC8#x1
*/ q_"w,28
public class SortUtil { Ies` !W^
public final static int INSERT = 1; \}YAQ'T
public final static int BUBBLE = 2; m5,&;~
public final static int SELECTION = 3; \H1t<B,
public final static int SHELL = 4; Tiimb[|
public final static int QUICK = 5; #GUD^#Jh
public final static int IMPROVED_QUICK = 6; 7E5=Qx
public final static int MERGE = 7; \i<7Lk
public final static int IMPROVED_MERGE = 8; v(, tu/
public final static int HEAP = 9; Q6N?cQtOT
3[ xHY@c
public static void sort(int[] data) { ocpM6b.fK
sort(data, IMPROVED_QUICK); ,H$%'s1I(
} ,&Vir)S
private static String[] name={ 3bQq Nk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /1Ss |.
}; v0T?c53?
xokA_3,1F
private static Sort[] impl=new Sort[]{ t{`krs``
new InsertSort(), O.-A)S@
new BubbleSort(), kX)*:~*
new SelectionSort(), 0+.<BOcW5
new ShellSort(), =p:~sn#
new QuickSort(), 5Y@Hb!5D
new ImprovedQuickSort(), O]@s`w
new MergeSort(), IfY?P(P
new ImprovedMergeSort(), SN[ar&I
new HeapSort() P5GV9SA
}; Rh)%;
RRl`;w?
public static String toString(int algorithm){ `L!L=.}4
return name[algorithm-1]; :z%Zur+n c
} $P2*qpqy
tC.etoh
public static void sort(int[] data, int algorithm) { $0+&xJVn
impl[algorithm-1].sort(data); }U%T6~_wR
} `_BmVms
D@]/%;
public static interface Sort { [e{D
public void sort(int[] data); JEP9!y9y
} o'Y/0hkh
Fr2F&NN`D
public static void swap(int[] data, int i, int j) { [*5hx_4%B
int temp = data; qt4%=E;[
data = data[j]; ,4;'s
data[j] = temp; D<WGau2H
} aEun *V^,
} BH}M]<5