[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; )_OKw?Zi
} z%;b-PpS
int i1=l; bE.,)GY
int i2=mid+1; NyI0[]z
for(int cur=l;cur<=r;cur++){ j`A%(()d
if(i1==mid+1) j^T.7Zv
data[cur]=temp[i2++]; m UpLD+-j
else if(i2>r) @ 9D, f
data[cur]=temp[i1++]; &,2h=H,M
else if(temp[i1] data[cur]=temp[i1++]; 7jT]J
else XKB)++Q=
data[cur]=temp[i2++]; tT87TmNsA
} D(D:/L8T,
} Rz1&(_Ps
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} fn )m$\2
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改进后的归并排序: *SQ hXTn
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package org.rut.util.algorithm.support; kDS
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import org.rut.util.algorithm.SortUtil; Zf}]sW$H
s@K)RhTY
/** C3Q[L}X\
* @author treeroot *z;4. OX
* @since 2006-2-2 W}bed],l
* @version 1.0 Vo<V!G{
*/ 4bqi&h3
public class ImprovedMergeSort implements SortUtil.Sort { Juj"cjob
-l<b|`s=w.
private static final int THRESHOLD = 10; 7OX5"u!2
PI(;t9]b
/* e.jrX;;$!&
* (non-Javadoc) X[:Hp`_$
* Enn7p9&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IlJ6&9
*/ .}S9C]d:a
public void sort(int[] data) { = ;#?CAa:
int[] temp=new int[data.length]; DVt;I$
mergeSort(data,temp,0,data.length-1); SuU,SE'TX
} n=l>d#}$%T
.ml24SeC
private void mergeSort(int[] data, int[] temp, int l, int r) { lN#W
int i, j, k; 1X2MhV
int mid = (l + r) / 2; Tz3 L#0:j
if (l == r) 7N,E%$QL
return; B)g7MG
if ((mid - l) >= THRESHOLD) js)M c*]&
mergeSort(data, temp, l, mid); %719h>$
else -jdS8n4
insertSort(data, l, mid - l + 1); HtB>#`'
if ((r - mid) > THRESHOLD) 0]=|3-n
mergeSort(data, temp, mid + 1, r); -iWt~
else Ac}+Uq
insertSort(data, mid + 1, r - mid); o<bZ.t
+<7~yZ[Z8
for (i = l; i <= mid; i++) { XQ]noaU
temp = data; &^Q-:Kxs8
} >%5Ld`c:SD
for (j = 1; j <= r - mid; j++) { awh<CmcZ
temp[r - j + 1] = data[j + mid]; 9HrT>{@
} ;X,|I)
int a = temp[l]; {J;[ Hf5
int b = temp[r]; WzZ<ZCHm
for (i = l, j = r, k = l; k <= r; k++) { @S\!wjl]C
if (a < b) { Ya{$:90(4
data[k] = temp[i++]; bHRH2Ss
a = temp; ,%7>%*nhk
} else { 2%UzCK
data[k] = temp[j--]; "C%<R
b = temp[j]; G(W/.*
} b{JcV
} |`[0U
} ,Bax0p
tIfA]pE
/** ekC 1wN l
* @param data AL@8v=
* @param l QG {KEj2V
* @param i \Fg%V>
*/ 69ZGdN
private void insertSort(int[] data, int start, int len) { qww*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %0l'Nuz
} S?ELFq(g
} 3y?I^ .B
} 4{4VC"fa
} cB#5LXbCE
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堆排序： 3gtQS3$4s
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package org.rut.util.algorithm.support; 6D3hX>K4
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import org.rut.util.algorithm.SortUtil; ieuq9ah#
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/** 1) 7n (
* @author treeroot vOIK6-
* @since 2006-2-2 A) {q7WI
* @version 1.0 4.Luy
*/ -{[5P!
public class HeapSort implements SortUtil.Sort{ .kKU MyW(
=hD@hQi
/* (non-Javadoc) ramYSX@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N?7MYP
*/ MYNNeO
public void sort(int[] data) { VwJA
MaxHeap h=new MaxHeap(); DmzK* O{
h.init(data); mY6d+
for(int i=0;i h.remove(); -yyim;Nj
System.arraycopy(h.queue,1,data,0,data.length); cW%QKdTQY0
} ! Rrk
j#4 Iu&YJ
private static class MaxHeap{ 5B6twn~[
tNpBRk(}
void init(int[] data){ {jdtNtw
this.queue=new int[data.length+1]; |Z6M?n
for(int i=0;i queue[++size]=data; ?RW7TWf
fixUp(size); 2tPW1"M.n
} %-9?rOr
} n!Hj4~T0
M~'4>h}
private int size=0; I_hus
Z[9) hGh
private int[] queue; _yx~t
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public int get() { 0QJ :
return queue[1]; DpD19)ouy
} RHO|g0
rdj_3Utv
public void remove() { fv@mA--
SortUtil.swap(queue,1,size--); 3an9Rb V
fixDown(1); S+wy^x@@
} YkWv*l
file://fixdown arVu`pD*n
private void fixDown(int k) { ki|KtKAu_9
int j; LAs#g||M
while ((j = k << 1) <= size) { 287g 5
if (j < size %26amp;%26amp; queue[j] j++; *LuR <V
if (queue[k]>queue[j]) file://不用交换 Uk1|y\
break; v@,n]"
SortUtil.swap(queue,j,k); }+mIP:T
k = j; #BPJRNXd
} eR1SPS1+
} (U_`Q1Jo
private void fixUp(int k) { vbA<=V*P
while (k > 1) { JRgrg&#
int j = k >> 1; # <?igtUO
if (queue[j]>queue[k]) OdKfU^
break; h@kq>no
SortUtil.swap(queue,j,k); WZ@hP'Zc
k = j; I1f4u6\*X
} }xx"
} ,5*Z<[*
)wZ;}O
} L<D<3g|4
8NF93tqD6
} 7C;oMh5
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SortUtil： hw5NHZ I'
z:Y Z]
package org.rut.util.algorithm; ,r5'nDV=d
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import org.rut.util.algorithm.support.BubbleSort; yN@3uYBF
import org.rut.util.algorithm.support.HeapSort; Yamu"#
import org.rut.util.algorithm.support.ImprovedMergeSort; ;{L~|q J
import org.rut.util.algorithm.support.ImprovedQuickSort; <6.aSOS
import org.rut.util.algorithm.support.InsertSort; 7y?aw`Sw:
import org.rut.util.algorithm.support.MergeSort; |lDxk[
import org.rut.util.algorithm.support.QuickSort; b#%$y
import org.rut.util.algorithm.support.SelectionSort; -s3q(SH
import org.rut.util.algorithm.support.ShellSort; cy-o@U"s8
UWXl c
/** Ei HQ&u*
* @author treeroot #zf,%IYF
* @since 2006-2-2 I%|,KWM
* @version 1.0 nmo<t]
*/ qkbGM-H%U
public class SortUtil { zH5pe
public final static int INSERT = 1; n2V $dF4m
public final static int BUBBLE = 2; #}p@+rkg2
public final static int SELECTION = 3; Cg8s9qE?
public final static int SHELL = 4; n 9>**&5L
public final static int QUICK = 5; C^IPddw>
public final static int IMPROVED_QUICK = 6; W5*Kq^6Pd
public final static int MERGE = 7; \V(w=
public final static int IMPROVED_MERGE = 8; ""f'L,`{.
public final static int HEAP = 9; P:#KBF;a
:{LNr!I?I
public static void sort(int[] data) { BQ:hUF3
sort(data, IMPROVED_QUICK); !qu/m B
} u<['9U
private static String[] name={ 7!;H$mxP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^j!2I&h1
}; B7QRG0
f&L3M)T
private static Sort[] impl=new Sort[]{ RW`j^q,c3
new InsertSort(), FoQy@GnM5
new BubbleSort(), h`n) b
new SelectionSort(), 0f5c#/7C9
new ShellSort(), %y{'p:
new QuickSort(), Q2>o+G
new ImprovedQuickSort(), Nov)'2g7G
new MergeSort(), Cut7
new ImprovedMergeSort(), \1He9~6
new HeapSort() V8hmfV~=]P
}; F$j?}
G"F)t(iX
public static String toString(int algorithm){ g-~]^$
return name[algorithm-1]; [xdi.6%
} |}o6N5)
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public static void sort(int[] data, int algorithm) { 8w$q4fg0
impl[algorithm-1].sort(data); j4:Xel/
} 60R]Q
q4T98s2J
public static interface Sort { 4KX\'K
public void sort(int[] data); 4aiI&,
} *e25!#o1
qKD Nw8>
public static void swap(int[] data, int i, int j) { ElA(1o|9I
int temp = data; 9vckQCLM
data = data[j]; g)1`A24
data[j] = temp; sj3[ny;b
} yBRYEqS+
} Js<DVe,