[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; LXEfPLS
} &K/ya7
int i1=l; qjf[zF
int i2=mid+1; mH Ic f{RG
for(int cur=l;cur<=r;cur++){ dZi(&s
if(i1==mid+1) '[C.|)"
data[cur]=temp[i2++]; &e;=cAXG
else if(i2>r) F{eU";D
data[cur]=temp[i1++]; G`\f
else if(temp[i1] data[cur]=temp[i1++]; LUC4=kk4
else ^j".
data[cur]=temp[i2++]; L5#P[cHzz
} QAvir%Y9Q
} ]@uE#a:[
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} ^go7_y
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改进后的归并排序: 8"dv_`ym
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package org.rut.util.algorithm.support; dl~%MWAVb
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import org.rut.util.algorithm.SortUtil; 6`]$qSTS
u86"Y^d#
/** xKQ+{"?-^g
* @author treeroot {_S}H1,
* @since 2006-2-2 zipS ]YD
* @version 1.0 Aj2OkD
*/ ~ECD`N<YF
public class ImprovedMergeSort implements SortUtil.Sort { :{IO=^D=$
<^zHE=h"
private static final int THRESHOLD = 10; ~$p2#AqX
o(S{VGi,
/* B x (uRj
* (non-Javadoc) ?Rj~f{%g
* _T2=J+"-Kp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )('%R|$ /
*/ Gm(b/qDDe
public void sort(int[] data) { Kj<^zo%w
int[] temp=new int[data.length]; ^}:#
mergeSort(data,temp,0,data.length-1); GDD '[;
} .h9l7 nZt
tQH+)*
private void mergeSort(int[] data, int[] temp, int l, int r) { %*&UJpbA
int i, j, k; o>7ts&rk
int mid = (l + r) / 2; U2`'qsR1
if (l == r) Q5FM8Q
return; P#fM:z@[
if ((mid - l) >= THRESHOLD) rFC" Jx
mergeSort(data, temp, l, mid); co9 .wB@
else ,(;lIP
insertSort(data, l, mid - l + 1); 3:8{"md@2
if ((r - mid) > THRESHOLD) #Sa27$&.>
mergeSort(data, temp, mid + 1, r); ik!..9aB
else " t7M3i_
insertSort(data, mid + 1, r - mid); LxpuhvIO
;$a@J&
for (i = l; i <= mid; i++) { mZx&Xez_G
temp = data; cZT({uYGL
} M-;4
for (j = 1; j <= r - mid; j++) { IdXZoY
temp[r - j + 1] = data[j + mid]; CMn{LQcC
} Clh!gpB c
int a = temp[l]; <<i3r|}
int b = temp[r]; BQ @huns3
for (i = l, j = r, k = l; k <= r; k++) { 7c~u=U"
if (a < b) { +reor@h
data[k] = temp[i++]; ~i21%$
a = temp; i:u1s"3~
} else { Rr!Y3)f;
data[k] = temp[j--]; D<V~f B
b = temp[j]; =e8bNg
} 2'5]~
} vq!_^F<
} 7f~Sf
_L@2_#h!
/** ,2j.<g&
* @param data 5vw{b?
* @param l ^|TG$`M(w
* @param i xCYE B}o9r
*/ Gkp<o
private void insertSort(int[] data, int start, int len) { dlG=Vq&Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jS]><rm
} =IUUeFv +r
} _>v<(7
} fgBM_c&9T
} c7M%xGrP
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堆排序： `\m*+Bk[5
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package org.rut.util.algorithm.support; Bf$_XG3
#?XQ7Im
import org.rut.util.algorithm.SortUtil; l2&`J_"
(XXheC
/** ^qC;Nh4F
* @author treeroot O)Y?=G)
* @since 2006-2-2 gt/zpiKmV
* @version 1.0 #rY sj-2
*/ HU9Sl*/
public class HeapSort implements SortUtil.Sort{ 4[BG#
QjC22lW-
/* (non-Javadoc) tOOchu?=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iC*F
*/ [xT:]Pw}
public void sort(int[] data) { EZYBeqv
MaxHeap h=new MaxHeap(); 9 Rx s
h.init(data); 8o/}}=m$
for(int i=0;i h.remove(); 5r?m&28X
System.arraycopy(h.queue,1,data,0,data.length); NuYkz"O]
} 1]}#)-
Z(9u<
private static class MaxHeap{ 8HZs>l
lhi_6&&[8
void init(int[] data){ .-JCwnP
this.queue=new int[data.length+1]; >/#KI~}'N
for(int i=0;i queue[++size]=data; _ib"b#
fixUp(size); #BQ.R,
} 3( ]M{4j
} 7c;9$j
jr)7kP@
private int size=0; Ed:eGm }
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private int[] queue; iA,kX\nK
>OP+^^oZ<
public int get() { ncSFj.}w]
return queue[1]; u-1;'a
} ^{\<N()R
(708H_
public void remove() { c)Ic#<e(
SortUtil.swap(queue,1,size--); XK"-'
fixDown(1); !bC+TYsU
} (oJ9k[(
file://fixdown "7v-`i
private void fixDown(int k) { 1RKW2RCaW_
int j; :0/q5_t
while ((j = k << 1) <= size) { < Z|Ep1W
if (j < size %26amp;%26amp; queue[j] j++; oxj3[</'k
if (queue[k]>queue[j]) file://不用交换 a"av#Y
break; i_kE^SSgm
SortUtil.swap(queue,j,k); WsFk:h'r
k = j; tV9LD>3
} ](B@5-^
} nkv(~ej(
private void fixUp(int k) { @vMA=v7a
while (k > 1) { kqb0>rYa
int j = k >> 1; O8]'o*<]
if (queue[j]>queue[k]) OgcHS?
break; \j2;4O?`
SortUtil.swap(queue,j,k); hb/]8mR
k = j; NjE</Empb%
} v?c 0[+?
} g}f9dB,F
{ls+dx/
} {}o>{&X
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} Fxc)}i`
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SortUtil： j,d*?'X
X1tXqHJF}
package org.rut.util.algorithm; Jd,)a#<j
@h?shW=^
import org.rut.util.algorithm.support.BubbleSort; +m}Pmi$
import org.rut.util.algorithm.support.HeapSort; 1G7b%yPA
import org.rut.util.algorithm.support.ImprovedMergeSort; < pTTo
import org.rut.util.algorithm.support.ImprovedQuickSort; =H8 xSJLh
import org.rut.util.algorithm.support.InsertSort; 4gSH(*}
import org.rut.util.algorithm.support.MergeSort; ICB~_O5
import org.rut.util.algorithm.support.QuickSort; [~\PQYm'
import org.rut.util.algorithm.support.SelectionSort; CU:o*;jP
import org.rut.util.algorithm.support.ShellSort; dx,=Rd5'
&ff&Y.q~
/** WhBpv(q}.
* @author treeroot ^2odr \
* @since 2006-2-2 H +bdsk
* @version 1.0 idRD![!UI
*/ fnCItK~y
public class SortUtil { <e%F^#y_
public final static int INSERT = 1; J!ntXF
public final static int BUBBLE = 2; |KYEK|
public final static int SELECTION = 3; "&Qctk`<P
public final static int SHELL = 4; ?8,%LIQ?
public final static int QUICK = 5; rC_*sx r^
public final static int IMPROVED_QUICK = 6; <P%}|@
public final static int MERGE = 7; '<iK*[NW
public final static int IMPROVED_MERGE = 8; qEUT90
public final static int HEAP = 9; ._z'g_c(
QMo}W{D
public static void sort(int[] data) { qW_u
sort(data, IMPROVED_QUICK); X~Rl 6/,
} S>q>K"j^!
private static String[] name={ 3ew8m}A{O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fU2qrcVu
}; ?@6/Alk
|DF9cd^
private static Sort[] impl=new Sort[]{ iv(5&'[p
new InsertSort(), utlpY1#q/
new BubbleSort(), r'BAT3
new SelectionSort(), 'j%F]CK
new ShellSort(), #kkY@k$4
new QuickSort(), RE3Z%;'
new ImprovedQuickSort(), 2h {q h
new MergeSort(), E3/:.t
new ImprovedMergeSort(), 9^F2$+T[:
new HeapSort() 8iC:xcN3
}; 2WvN2"f3
Ap\AP{S4
public static String toString(int algorithm){ m+$ @'TbP
return name[algorithm-1]; MVCl.o
} V+wH?H=
E{Pgf8
public static void sort(int[] data, int algorithm) { !.5),2
impl[algorithm-1].sort(data); !SHj$Jwa'
} }iBC@`mg(
_L.n,
public static interface Sort { % 0:p)Z0
public void sort(int[] data); 7yI@"c#O
} ps:f=6m2
io4A>>W==/
public static void swap(int[] data, int i, int j) { >n.z)ZJ
int temp = data; FdOFE.l
data = data[j]; X7*`
data[j] = temp; fn{S "33"
} J?:[$C5
} |f2A89