[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; "a].v 8l!
} N ;=zo-8
int i1=l; Y_Fn)(
int i2=mid+1; 6 eryf?
for(int cur=l;cur<=r;cur++){ PwW$=M{\.
if(i1==mid+1) Xk.OyQ@
data[cur]=temp[i2++]; K ,NmDc^
else if(i2>r) 8Azh&c
data[cur]=temp[i1++]; ,r*Kxy
else if(temp[i1] data[cur]=temp[i1++]; EF!J#N2
else sJx_X8
data[cur]=temp[i2++]; fD@d.8nXd
} Xr=BxBttp
} N `:MF 9
Yw#fQFm
} 9vP;i= fr
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改进后的归并排序: Xuu&`U~%
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package org.rut.util.algorithm.support; Hk;;+'-
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import org.rut.util.algorithm.SortUtil; [3bPoAr\
7zCJ3p
/** 2`*w*
* @author treeroot ~\(c;J*Ir
* @since 2006-2-2 [ne51F5_
* @version 1.0 }0pp"[JU
*/ /%g9g_rt#
public class ImprovedMergeSort implements SortUtil.Sort { \_O#M
"<+~uz
private static final int THRESHOLD = 10; (Ff}Y.4
g,]o+nT
/* %:'G={G`QH
* (non-Javadoc) Xgd-^
* joskKik^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W]/J]O6
*/ ;*Vnwt A
public void sort(int[] data) { qdI%v#'M
int[] temp=new int[data.length]; n[0u&m8
mergeSort(data,temp,0,data.length-1); ;>mM9^Jaf
} ( jU $
|hxiARr4
private void mergeSort(int[] data, int[] temp, int l, int r) { />mK.FT
int i, j, k; lXTE#,XVf
int mid = (l + r) / 2; i<F7/p "-
if (l == r) MrB#=3pT
return; "x9yb0
if ((mid - l) >= THRESHOLD) z |llf7:
mergeSort(data, temp, l, mid); 4 9N.P;b
else nrMW5>&-`
insertSort(data, l, mid - l + 1); >)<?
if ((r - mid) > THRESHOLD) }P?e31@:
mergeSort(data, temp, mid + 1, r); 0&sa#g2
else %?+vtX
insertSort(data, mid + 1, r - mid); {)"[_<
V3ozaVk;
for (i = l; i <= mid; i++) { )>{.t=#
temp = data; te(H6c#0
} uCr& `
for (j = 1; j <= r - mid; j++) { BJwuN
temp[r - j + 1] = data[j + mid]; uKAI->"
} U.,S.WP+d
int a = temp[l]; $,@}%NlHc
int b = temp[r]; dvjj"F'Bf
for (i = l, j = r, k = l; k <= r; k++) { enJ;#aA
if (a < b) { _Z]l=5d
data[k] = temp[i++]; "jyo'r
a = temp; ={;pg(
} else { y#B=9Ri=z
data[k] = temp[j--]; +Mq\3
b = temp[j]; |&8XmexLb
} IMwV9rF
} $6mShp9(
} Mc.{I"c@
*|Vf1R]
/** F}So=Jz9h
* @param data Y M:9m)
* @param l x3cjyu<K
* @param i ,Suk_aX>
*/ Ztmh z_u7
private void insertSort(int[] data, int start, int len) { LH(P<k&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (|<S%?}J
} THhxj)
} > pb}@\;:
} ISC>]`
} 6:G&x<{
n#x_da-m]
堆排序： ((A@VcX
Gt#r$.]W?o
package org.rut.util.algorithm.support; +8zACs{p
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import org.rut.util.algorithm.SortUtil; 1ARtFR2C{b
HSNj
/** [T r7SU#x
* @author treeroot dPu27 "
* @since 2006-2-2 "qq$i35x
* @version 1.0 :ir#7/
*/ `3\U9ZH23
public class HeapSort implements SortUtil.Sort{ I%r7L
$/"Ymm#"\Y
/* (non-Javadoc) @`KbzN_h/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =hTJp/L
*/ #B~;j5
public void sort(int[] data) { W,[ RB
MaxHeap h=new MaxHeap(); XA#qBxp/h
h.init(data); Xw9]WJc
for(int i=0;i h.remove(); ]2m=lt1
System.arraycopy(h.queue,1,data,0,data.length); NW6;7nWb
} gS<p~LPf
4ct-K)Ris
private static class MaxHeap{ !QwB8yK@
<lFHmi$qt{
void init(int[] data){ esTL3 l{[
this.queue=new int[data.length+1]; t#P7'9Se8
for(int i=0;i queue[++size]=data; |.Vgk8oTl
fixUp(size); v];YC6shx
} it H
} @I4HpY7:
F'[Y.tA ,#
private int size=0; aQ(P#n>a2
d3rjj4N"z
private int[] queue; aU;X&g+_)
P s>Y]
public int get() { RjVUm+<
return queue[1]; ub8d]GZJ
} R-zS7Jyox
,Dv*<La`\
public void remove() { \uHC9}0
SortUtil.swap(queue,1,size--); Ag0 6M U
fixDown(1); #@HlnF}T
} u|wl;+.
file://fixdown $MgO)bH
private void fixDown(int k) { MRz f#o<H
int j; ).jQ+XE'>
while ((j = k << 1) <= size) { !:\0}w$-
if (j < size %26amp;%26amp; queue[j] j++; 4Mg%}/cC
if (queue[k]>queue[j]) file://不用交换 $)*qoV
break; A v>v\ :.>
SortUtil.swap(queue,j,k); %G(VYCeK
k = j; :7X4VHw/
} ;Lfn&2G
} 392(N(
private void fixUp(int k) { UUz{Qm%
while (k > 1) { ;V~x[J|x
int j = k >> 1; '~ B2[
if (queue[j]>queue[k]) K@n-#
break; ugN%8N
SortUtil.swap(queue,j,k); 02EX_tt),
k = j; Yz2N(g[
} =A,T:!}'
} L=;T$4+p
tOVTHx3E]
} ^(
$'CS/U`E}
} r ts2Jk7f
4j0;okQWV'
SortUtil： 8cZ[Kl%
FP&Ykx~
package org.rut.util.algorithm; lGahwn:
N>EMVUVS
import org.rut.util.algorithm.support.BubbleSort; ,k.")
import org.rut.util.algorithm.support.HeapSort; j{FRD8]V
import org.rut.util.algorithm.support.ImprovedMergeSort; 7)D[}UXz
import org.rut.util.algorithm.support.ImprovedQuickSort; b'^<0c
import org.rut.util.algorithm.support.InsertSort; E2}X[EoBF
import org.rut.util.algorithm.support.MergeSort; &&$*MHJ
import org.rut.util.algorithm.support.QuickSort; 3-{WFnA
import org.rut.util.algorithm.support.SelectionSort; b&E"r*i|
import org.rut.util.algorithm.support.ShellSort; M3UC9t9]
J0k!&d8
/** Tr>_R%bK
* @author treeroot T] H'l
* @since 2006-2-2 8)iI=,T*
* @version 1.0 zytW3sTZA
*/ GBZu<t/
public class SortUtil { m==DBh
public final static int INSERT = 1; z+oy#p6+F.
public final static int BUBBLE = 2; $27OrXQ|
public final static int SELECTION = 3; *lZ V3F
public final static int SHELL = 4; rgXX,+cO
public final static int QUICK = 5; q}jh>`d
public final static int IMPROVED_QUICK = 6; xC +>R1)
public final static int MERGE = 7; ])qnPoQ<n
public final static int IMPROVED_MERGE = 8; 4J'0k<5S
public final static int HEAP = 9; (ZF~
3`D*AFQc
public static void sort(int[] data) { `;G@qp:A
sort(data, IMPROVED_QUICK); Jon3ywd1Y
} EpACd8Fb
private static String[] name={ $[HCetaqV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w$s6NBF7
}; gZ>&cju
9`qw,X&AK_
private static Sort[] impl=new Sort[]{ WllQM,h
new InsertSort(), p:tp|/
new BubbleSort(), 'Kmf6iK>[
new SelectionSort(), {pXX%>
new ShellSort(), cfBlHeYE
new QuickSort(), %t* 9sh
new ImprovedQuickSort(), JI-.SR
new MergeSort(), AWFq5YMSI
new ImprovedMergeSort(), I^LU*A=
new HeapSort() c<q33dZ!*
}; |R91|-H
!}mM"|<
public static String toString(int algorithm){ &<&eKq
return name[algorithm-1]; .+8#&Uy
} ^Q0=Ggh
7ko}X,aC
public static void sort(int[] data, int algorithm) { oP7)
impl[algorithm-1].sort(data); _o?aO C
} t#f-3zd9
w"kBAi&
public static interface Sort { X/%!p<}:'
public void sort(int[] data); 9^sz,auB
} JC$_Pg!
g]MgT-C|
public static void swap(int[] data, int i, int j) { |LZ+_
int temp = data; G a$2o6
data = data[j]; @~=d4Wj6
data[j] = temp; LkF*$
} 'SE5sB
} N6\m*j,`