[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; N.j?:
} EUVB>%P
int i1=l; Kzv*`
int i2=mid+1; sE,Q:@H5
for(int cur=l;cur<=r;cur++){ 9lT6fW`v1Q
if(i1==mid+1) lDBn3U&z>
data[cur]=temp[i2++]; 9!aQ@ J^
else if(i2>r) rSGt`#E-s.
data[cur]=temp[i1++]; Dg:2*m_!j{
else if(temp[i1] data[cur]=temp[i1++]; zAr@vBfC%
else d&!ZCq#_e
data[cur]=temp[i2++]; z3 zN^ZT
} 3n\eCdV-b<
} U}r^M( s!
6f$h1$$)^
} k!%[W,*
&n5Lc`
改进后的归并排序: d;Uzl1;
qQL]3qP
package org.rut.util.algorithm.support; ZO`{t1
!!WSGZUR
import org.rut.util.algorithm.SortUtil; )v4?+$g
@R!f(\
/** Hl@)j
* @author treeroot #D{jNSB
* @since 2006-2-2 M- f)\`I
* @version 1.0 8Z^9r/%*Z
*/ |'C{nTX
public class ImprovedMergeSort implements SortUtil.Sort { p=tj>{
]#UyYgPk
private static final int THRESHOLD = 10; 6$d3Ap@Gl
dHE\+{K%-
/* > @Ux8#
* (non-Javadoc) k8]uy2R6}
* G!y~Y]e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~"oxytJ
*/ @0XqUcV
public void sort(int[] data) { {5ujKQOcR
int[] temp=new int[data.length]; =bVaB<!
mergeSort(data,temp,0,data.length-1); 5CSihw/5
} YW|KkHi*
(sngq{*%%z
private void mergeSort(int[] data, int[] temp, int l, int r) { (c{<JYEC
int i, j, k; Rf&~7h'+
int mid = (l + r) / 2; [Rqv49n*V
if (l == r) r%*UU4xvB
return; `M "O #
if ((mid - l) >= THRESHOLD) fvW7a8k3
mergeSort(data, temp, l, mid); s'&/8RR
else ^,Paih 2
insertSort(data, l, mid - l + 1); JN9 W:X.
if ((r - mid) > THRESHOLD) YKjm_)8]w
mergeSort(data, temp, mid + 1, r); i.0}d5Y
else ur'a{BI2R
insertSort(data, mid + 1, r - mid); s^ t1T&
XQ+KI:g2
for (i = l; i <= mid; i++) { ^|z
temp = data; MjO.s+I
} 1LgzqRq
for (j = 1; j <= r - mid; j++) { jIZpv|t)
temp[r - j + 1] = data[j + mid]; g3p*OYf
} RhJ{#G~:%
int a = temp[l]; DPrFBy
int b = temp[r]; RHV&m()Q
for (i = l, j = r, k = l; k <= r; k++) { -ejH%CT
if (a < b) { xMk0Xf'_
data[k] = temp[i++]; +Om(&\c(6
a = temp; YTiXUOj
} else { y4aW8J#
data[k] = temp[j--]; .t/XW++
b = temp[j]; D ^ mfWJS
} *vx!twu1o
} vOb=>
} Q:.q*I!D<4
S7tc
/** &ukYTDM
* @param data oW:p6d
* @param l .%{3#\
* @param i e8HGST`
*/ b%w?YR
private void insertSort(int[] data, int start, int len) { MGH(= w1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xWY%-CWY.
} G(LGa2;Zg
} `0@onDQVc=
} s~ZLnEb
} (#Vkk]-p
3"ALohlL
堆排序： nLn3kMl4
!J3dlUFRO
package org.rut.util.algorithm.support; +{Qk9Z
3h:"-{MW.
import org.rut.util.algorithm.SortUtil; K{eq'F5M
o6JCy\Bx
/** Lh0qB)>
* @author treeroot XBd/,:q
* @since 2006-2-2 B}Q.Is5
* @version 1.0 D4e*Wwk
*/ -;/;dz;
public class HeapSort implements SortUtil.Sort{ _K(w&Kr
4Wz@^7|V5
/* (non-Javadoc) *]<M%q!<6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `)sC".b7
*/ -;5WMX6
public void sort(int[] data) { 5)g6yV'
MaxHeap h=new MaxHeap(); E$B7E@(U
h.init(data); [,A*nU$
for(int i=0;i h.remove(); Gqe?CM
System.arraycopy(h.queue,1,data,0,data.length); PuKT0*_ 7
} vM_UF{a$=
dso6ZRx
private static class MaxHeap{ -6wjc rTD
84xA/BRW
void init(int[] data){ <m;idfn
this.queue=new int[data.length+1]; \k?Fu=@
for(int i=0;i queue[++size]=data; C%hMh/Li;
fixUp(size); }.j<kmd
} 6Fp}U
} +;Yd<~!c Z
j<H5i}
private int size=0; 6[r-8_
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private int[] queue; N3J T[7
\UBTNY,
public int get() { Nqf6CPXE
return queue[1]; in>Os@e#
} * z,] mi%
+M@,CbqD
public void remove() { PtfxF]%H
SortUtil.swap(queue,1,size--); F+%6?2J
fixDown(1); jc%
} "])yV
file://fixdown QqpXUyHp[
private void fixDown(int k) { I_QWdxn
int j; oqLM-=0<}
while ((j = k << 1) <= size) { <4l;I*:2&
if (j < size %26amp;%26amp; queue[j] j++; 4z{jWNM)N
if (queue[k]>queue[j]) file://不用交换 Z/Vb_
break; fdU`+[_
SortUtil.swap(queue,j,k); XsOz {?G
k = j; <a=,{O
} ]@Gw$
} #Uc0W
private void fixUp(int k) { Sbf+;:D
while (k > 1) { &OK[n1M
int j = k >> 1; ;M)l7f
if (queue[j]>queue[k]) 9E@}@ZV(
break; uA`EJ )d
SortUtil.swap(queue,j,k); P4h^_*d
k = j; #2dd`F8
} `E@TPdu
} &CtWWKS"
M1>2Q[h7
} Mg7nv\6
]]R!MnU:$
} *hm;C+<~
#b^x!lR
SortUtil： >q+q];=(
[/P}1 c[)U
package org.rut.util.algorithm; \A~r~
E%+aqA)f
import org.rut.util.algorithm.support.BubbleSort; '[T#d!T
import org.rut.util.algorithm.support.HeapSort; F9N/_H*+
import org.rut.util.algorithm.support.ImprovedMergeSort; /o/0 9K
import org.rut.util.algorithm.support.ImprovedQuickSort; ])v,zp"u
import org.rut.util.algorithm.support.InsertSort; /,tQdD&
import org.rut.util.algorithm.support.MergeSort; ,JLY oE+
import org.rut.util.algorithm.support.QuickSort; E/<5JhI9~
import org.rut.util.algorithm.support.SelectionSort; X+R?>xq{=h
import org.rut.util.algorithm.support.ShellSort; ~|FKl%
&,4 3&pFU
/** t;^NgkP{$
* @author treeroot H#Aar
* @since 2006-2-2 Y{Yp N
* @version 1.0 v/1&V+"^kd
*/ &efwfnG<
public class SortUtil { %T_4n^beFQ
public final static int INSERT = 1; 31FQ=(K
public final static int BUBBLE = 2; o3s ME2
public final static int SELECTION = 3; ZRD@8'1p
public final static int SHELL = 4; qGH s2Og
public final static int QUICK = 5; f^EDiG>b`
public final static int IMPROVED_QUICK = 6; ^")SU(`
public final static int MERGE = 7; kS\A_"bc
public final static int IMPROVED_MERGE = 8; p!XB\%sv'"
public final static int HEAP = 9; &*w)/W
t V]BcDp
public static void sort(int[] data) { QcXqMx
sort(data, IMPROVED_QUICK); KX|7mr90K
} SLj2/B0
private static String[] name={ f{[]m(X;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O<H5W|cM
}; G#|`Bjv"aP
|q( .j4[i
private static Sort[] impl=new Sort[]{ P ~sX S
new InsertSort(), z. 6-D
new BubbleSort(), vz~QR i*
new SelectionSort(), H7I&Ky
new ShellSort(), m$w'`[H
new QuickSort(), L{2KK]IF
new ImprovedQuickSort(), ~boTh
new MergeSort(), 3BSJ|o<"=
new ImprovedMergeSort(), `Dn"<-9:
new HeapSort() 9"jhS0M
}; [1 ?
8}Qmhm`_j=
public static String toString(int algorithm){ a$~pAy5C
return name[algorithm-1]; 7e`ylnP!
} \dq}nOsX*
{dbPMx
public static void sort(int[] data, int algorithm) { ^xpiNP!?a
impl[algorithm-1].sort(data); ;1wRo`RD
} S(c&XJR
8ph*S&H
public static interface Sort { )PU_'n=>
public void sort(int[] data); oaK&!$S]
} ]W7e2:Hra
a%fMf[Fu
public static void swap(int[] data, int i, int j) { 5d4/}o}%"
int temp = data; @_+B'<2
data = data[j]; <6djdr1:b
data[j] = temp; ?FRuuAS
} ^O9_dP:
} kt0ma/QpP