[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; r^e-.,+
} D8W(CE^}
int i1=l; pc^E'h:
int i2=mid+1; u"eZa!#
for(int cur=l;cur<=r;cur++){ $*g{[&L|6
if(i1==mid+1) ^g\h]RD}
data[cur]=temp[i2++]; \#HL`R"
else if(i2>r) %sYk0~E
data[cur]=temp[i1++]; =GLYDV
else if(temp[i1] data[cur]=temp[i1++]; ]D?oQ$q7
else p<ry$=`
data[cur]=temp[i2++]; N%:D8\qx
} @i;LZa
} 2~+'vi
s9=pV4fA~w
} O$YJku
5QNBB|X@
改进后的归并排序: S".owe$\
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package org.rut.util.algorithm.support; bl6':m+
N IO;
import org.rut.util.algorithm.SortUtil; ">03~:oA
x[zKtX
/** 54bF)<+
* @author treeroot RiwEuY
* @since 2006-2-2 [Q7`RB
* @version 1.0 u)wu=z8
*/ !Mm+bWn=mB
public class ImprovedMergeSort implements SortUtil.Sort { l^)o'YS y
HdDo&#
private static final int THRESHOLD = 10; rAtai}Lx
w}fqs/)w
/* 5B_-nYJDt
* (non-Javadoc) -(`K7T>D.
* :+kg4v&r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6f<*1YR F
*/ 7m vSo350
public void sort(int[] data) { @w+WLeJ$40
int[] temp=new int[data.length]; Z{Lmd`<w`j
mergeSort(data,temp,0,data.length-1); ~]jx+6k]
} f'8B[&@L
Fa Qu$q
private void mergeSort(int[] data, int[] temp, int l, int r) { ytuWT,u
int i, j, k; *)2x&~T*|
int mid = (l + r) / 2; "'Q$.sR
if (l == r) g9RzzE!
return; Djg1Qh
if ((mid - l) >= THRESHOLD) |E>v~qD8I
mergeSort(data, temp, l, mid); 1==P.d(
else rerUM*0
insertSort(data, l, mid - l + 1); 30wYc &H
if ((r - mid) > THRESHOLD) o;HdW
mergeSort(data, temp, mid + 1, r); h'z+8X_t
else OLhWkN,qA
insertSort(data, mid + 1, r - mid); v)X[gt tf
+-xSuR,
for (i = l; i <= mid; i++) { 1_p[*h
temp = data; h Kp,4D>2_
} y$+!%y*
for (j = 1; j <= r - mid; j++) { )m$1al
temp[r - j + 1] = data[j + mid]; /1s9;'I
} AIIBd
int a = temp[l]; "H/2r]?GT
int b = temp[r]; !;BZ#tF&
for (i = l, j = r, k = l; k <= r; k++) { |:J*>"sq
if (a < b) { <lsi.x\y<
data[k] = temp[i++]; rF <iWM=
a = temp; 6z%&A]6k:
} else { N?Z+zN&P
data[k] = temp[j--]; A,-[/Z K/
b = temp[j]; %FXIlH5
} 2`q^Q
} 4okHAv8;
} LrmtPnL
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/** 8 RzF].)
* @param data k}+MvGq
* @param l |TNiKy
* @param i &Nj:XX;X
*/ Gx~"iM
private void insertSort(int[] data, int start, int len) { N7Z(lI|a;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .j+2x[`l
} Huug_E+
} `SSP53R(0
} O4'kS @
} ?[*@T2Ck
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堆排序： |yId6v
* 7zN
package org.rut.util.algorithm.support; 8Pnqmjjj
.lNnY8<
import org.rut.util.algorithm.SortUtil; umHs"d
<7sF<KD
/** |{}d5Z"5;}
* @author treeroot ?$`1%Y9
* @since 2006-2-2 KqG$zC^N
* @version 1.0 ` i^`Q
*/ c=jTs+h'
public class HeapSort implements SortUtil.Sort{ *n$m;yI
z!Pdivx
/* (non-Javadoc) }hObtAS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hz>yv@1
*/ S{`!9Pii
public void sort(int[] data) { F?+Uar|-a
MaxHeap h=new MaxHeap(); t"!8
h.init(data); 3qV>TE]6,
for(int i=0;i h.remove(); [4+a 1/^
System.arraycopy(h.queue,1,data,0,data.length); xYzcV%-Pm
} t0AqGrn
S3JygN*
private static class MaxHeap{ dKN3ZCw*gF
TnZc.
void init(int[] data){ l,FG:"`Z@
this.queue=new int[data.length+1]; SjNwT[.nr7
for(int i=0;i queue[++size]=data; aF4V|?+
fixUp(size); [XY:MUe
} r)Mx.`d!
} +'YSpJ
)4o=t.O\K
private int size=0; j)lM:vXR
MlcoOi!
private int[] queue; %(wsGNd
dA MilTo
public int get() { 7HR%rO?'
return queue[1]; 7=M'n;!Mh
} A)`fD %+
ED =BZR
public void remove() { L}sm R,
SortUtil.swap(queue,1,size--); XH Zu>[
fixDown(1); *z;N
} (w7cdqe
file://fixdown '=G<)z@k
private void fixDown(int k) { ~)\1g0
int j; -fZShOBY`
while ((j = k << 1) <= size) { OHa{!SaL
if (j < size %26amp;%26amp; queue[j] j++; " :nVigw&
if (queue[k]>queue[j]) file://不用交换 ;r@R (Squ
break; bUg2Bm!y
SortUtil.swap(queue,j,k); .AQ3zpy5B
k = j; BOl$UJ|K
} b3HTCO-,fC
} J|64b
private void fixUp(int k) { _tauhwu
while (k > 1) { (L6]uNOG
int j = k >> 1; W2o8Fu
if (queue[j]>queue[k]) `efH(
break; hcqmjqJ
SortUtil.swap(queue,j,k); %+OPas8C
k = j; Pt)}HF|u
} kHIQ/\3?Q
} [ QL<&:s&
cE8 _keR~
} %?{2uMfq-f
2*",{m
} h/y}
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SortUtil： BKlc{=
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package org.rut.util.algorithm; r3bvuq,6$
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import org.rut.util.algorithm.support.BubbleSort; 0{Ll4
import org.rut.util.algorithm.support.HeapSort; =rtA{g$)+
import org.rut.util.algorithm.support.ImprovedMergeSort; a*wJcJTpV"
import org.rut.util.algorithm.support.ImprovedQuickSort; x jUH<LFxy
import org.rut.util.algorithm.support.InsertSort; }T*xT>p^3
import org.rut.util.algorithm.support.MergeSort; W;@ae,^
import org.rut.util.algorithm.support.QuickSort; R8W44I*R:
import org.rut.util.algorithm.support.SelectionSort; l$_+WC*wp
import org.rut.util.algorithm.support.ShellSort; l?<z1Acd&
z{M,2
/** n[w,x;
* @author treeroot ,8 NEnB
* @since 2006-2-2 l$~bkVNL
* @version 1.0 7|eSvC
*/ +Q#Qu0_
public class SortUtil { _w,0wn9N$
public final static int INSERT = 1; Ak-7}i
public final static int BUBBLE = 2; >mDubP
public final static int SELECTION = 3; s/&]gj"
public final static int SHELL = 4; &^D@(m7>{K
public final static int QUICK = 5; ~E|V{z%
public final static int IMPROVED_QUICK = 6; G78j$ ^/0
public final static int MERGE = 7; %_=R&m'n`
public final static int IMPROVED_MERGE = 8; U=#ylQ
public final static int HEAP = 9; Z1lF[d,f;
&``oZvuB
public static void sort(int[] data) { Jt, 4@
sort(data, IMPROVED_QUICK); s=@CeV@4W
} Ewsg&CCN
private static String[] name={ I\6<)2j/L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DT]p14@t9
}; :mHtK)z~
S7>gNE;%]u
private static Sort[] impl=new Sort[]{ [k{iN1n
new InsertSort(), :\;uJ5
new BubbleSort(), ->9xw
new SelectionSort(), "@?kxRn!
new ShellSort(), Nn7@+g)
new QuickSort(), y8n1IZ*#SZ
new ImprovedQuickSort(), TFA
new MergeSort(), ]TprPU39
new ImprovedMergeSort(), P&`r87J
new HeapSort() l%5%oN`4
}; [MP:Eeg
[)0k}
public static String toString(int algorithm){ ]<z(Rmn`Q
return name[algorithm-1]; xVX||rrh
} u`2k6.-
s3!LR2qiF
public static void sort(int[] data, int algorithm) { ;<R_j%*
impl[algorithm-1].sort(data); \k-juF80
} iC2nHZ*,
z(68^-V=:
public static interface Sort { Ui;s.f
public void sort(int[] data); 5&Kn #
} ho$%7mc
(uc)^lfX
public static void swap(int[] data, int i, int j) { F@K;A%us)
int temp = data; ;@s~t:u
data = data[j]; %Z0S"B 3
data[j] = temp; RYaofW
} eE_XwLE
} M:f=JuAx