[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$1ht^
} r85Xa'hh
int i1=l; R,d70w (_
int i2=mid+1; z:ru68
for(int cur=l;cur<=r;cur++){ !7IT~pO`
if(i1==mid+1) +E q~X=x
data[cur]=temp[i2++]; U}RS*7`
else if(i2>r) ?z)y%`}
data[cur]=temp[i1++]; w-0O j
else if(temp[i1] data[cur]=temp[i1++]; $L<_uqSk
else Y^c,mK^
data[cur]=temp[i2++]; WTV3p,;6a
} ,E*a$cCw
} 1c<CEq:?e%
IS0HV$OI
} 'K;4102\
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改进后的归并排序: e_>rJWI}
[x$eF~Kp
package org.rut.util.algorithm.support; xu%! b0
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import org.rut.util.algorithm.SortUtil; h0QYoDvbC
N#pl mPrZ
/** DK@w^ZW6JA
* @author treeroot UALg!M#
* @since 2006-2-2 Ry8WNVO}R
* @version 1.0 8zCGMhd
*/ LRCS)UBY(.
public class ImprovedMergeSort implements SortUtil.Sort { r7Q:l ?F2
-KIVnV=&m
private static final int THRESHOLD = 10; (Qx-KRH
(jo(bbpj
/* siss_1J
* (non-Javadoc) 9aF..
* 282+1X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~P]HG;$?n
*/ EMW4<na[
public void sort(int[] data) { +%Bf y4F6
int[] temp=new int[data.length]; XZep7d}
mergeSort(data,temp,0,data.length-1); nIT^'
} g<hv7?"[
CQ8o9A/
private void mergeSort(int[] data, int[] temp, int l, int r) { G7/?hky 0.
int i, j, k; YzhN|!;!k
int mid = (l + r) / 2; cT>z
if (l == r) AG$-U2ap
return; \6`%NhkM_
if ((mid - l) >= THRESHOLD) WkDn
mergeSort(data, temp, l, mid); .~A"Wyu\
else t0asW5f
insertSort(data, l, mid - l + 1); LKf5r,C
if ((r - mid) > THRESHOLD) Yyo9{4v+p{
mergeSort(data, temp, mid + 1, r); ,$6MM6W;-F
else $vw}p.
insertSort(data, mid + 1, r - mid); E9Xk8w'+
G8(i).Q
for (i = l; i <= mid; i++) { soqNzdTB2
temp = data; l6`d48U
} y`B!6p 5j
for (j = 1; j <= r - mid; j++) { YAC zznN
temp[r - j + 1] = data[j + mid]; ' ! UF&
} H8t{ >C)]
int a = temp[l]; [^(R1K
int b = temp[r]; "PX3%II
for (i = l, j = r, k = l; k <= r; k++) { Eps\iykB
if (a < b) { U70@}5!
data[k] = temp[i++]; 3 ?|; on
a = temp; a4a[pX,5
} else { v$Y1+Ep9
data[k] = temp[j--]; -Ib+/'
b = temp[j]; Ye=7Y57Nr
} `1d`9AS2g
} !qGx(D{\
} l6DIsR
U`nS` p
/** RAuAIiQ
* @param data 5wFS.!xD
* @param l yE|} r
* @param i gl7vM
*/ @~U6=(+
private void insertSort(int[] data, int start, int len) { K"6+X|yxE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i!}nGJGg
} y[@j0xlO
} `~+a=Q
} `J,~hK
} w4MMo
[U7,\o4w
堆排序： &{4Mo,x
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package org.rut.util.algorithm.support; }!7DF
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import org.rut.util.algorithm.SortUtil; D*r Zaqy
HYYx*CJ)
/** f, j(uP
* @author treeroot 6M vRR
* @since 2006-2-2 NG W{Z~l
* @version 1.0 A8Z?[,Mq!
*/ +xdFkc
public class HeapSort implements SortUtil.Sort{ f{5|}PL
d!z).G
/* (non-Javadoc) 3k[<4-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3)Awj++
*/ O+Lb***b"
public void sort(int[] data) { CU^3L|f2N
MaxHeap h=new MaxHeap(); B';>Hk
h.init(data); 78inh%
for(int i=0;i h.remove(); 70*iJ^|
System.arraycopy(h.queue,1,data,0,data.length); u.4vp]eU
} j{-7Pf8A
Y{|~A
private static class MaxHeap{ 3pjYY$'
z.Kq}r^
void init(int[] data){ i|{nj\6w^
this.queue=new int[data.length+1]; Fl3r!a!P,
for(int i=0;i queue[++size]=data; X*yp=qI
fixUp(size); U\ E{-7
} Mciq9{8&
} =y]b|"s~2
~ 2oP,
private int size=0; BW-P%:B1!R
z'D{:q
private int[] queue; 2m_M9e\
` +UMZc
public int get() { :#htOsP
return queue[1]; $$f$$
} w:xKgng=L
l@J|p#0q
public void remove() { n)!_HNc9
SortUtil.swap(queue,1,size--); >MY.Fr#.m
fixDown(1); Cj9O[
} ko>O~@r
file://fixdown VEKITBs
private void fixDown(int k) { Z?aR9OTP
int j; xt0j9{p
while ((j = k << 1) <= size) { ^&/&I9z
if (j < size %26amp;%26amp; queue[j] j++; CvWEXY_P2
if (queue[k]>queue[j]) file://不用交换 7kpW1tjY
break; _rVX_
SortUtil.swap(queue,j,k); lBZ*G
k = j; )t|Q7$v1
} >d V@9
} E!l1a5qB
private void fixUp(int k) { 8"UG&wLT
while (k > 1) { .p~;U|h"
int j = k >> 1; HMd)64(
if (queue[j]>queue[k]) gH)B` @
break; .(]1PKW
SortUtil.swap(queue,j,k); B2WX#/lgd
k = j; 0BE^qe
} CHP6H}#|g
} n<&R"89
H).5xx[`
} -\C6j
o`! :Q!+
} B4&pBiG&f6
gF5EtdN?|
SortUtil： =u"|qD
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package org.rut.util.algorithm; i3j jPN!
',7Z1O
import org.rut.util.algorithm.support.BubbleSort; ;FflEL<7Y
import org.rut.util.algorithm.support.HeapSort; x99 Oq!
import org.rut.util.algorithm.support.ImprovedMergeSort; =PM#eu
import org.rut.util.algorithm.support.ImprovedQuickSort; =Fl4tY#X
import org.rut.util.algorithm.support.InsertSort; (HKm2JuFG
import org.rut.util.algorithm.support.MergeSort; Gn4b\y%%
import org.rut.util.algorithm.support.QuickSort; 7N=VVD~!b
import org.rut.util.algorithm.support.SelectionSort; =@XR$Uud6
import org.rut.util.algorithm.support.ShellSort; `.WKU"To
Utp\}0GZY
/** *3Z#r
* @author treeroot u Aa>6R
* @since 2006-2-2 J"|$V#
* @version 1.0 @sO.g_yM
*/ 7gaC)j&
public class SortUtil { /*HSAjv
public final static int INSERT = 1; !Sh5o'D28
public final static int BUBBLE = 2; h1)\.F4G
public final static int SELECTION = 3; Q3Lqj2r
public final static int SHELL = 4; TY?io@
public final static int QUICK = 5; imQNfNm
public final static int IMPROVED_QUICK = 6; uB5o Ghu-
public final static int MERGE = 7; _lqAxWH
public final static int IMPROVED_MERGE = 8; LnX^*;P5t
public final static int HEAP = 9; 7B`0mK3
YaNVpLA
public static void sort(int[] data) { epm|pA*
sort(data, IMPROVED_QUICK); ~zRd||qv
} HYtkSsXLN
private static String[] name={ Hkpn/,D5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q4VOK 'N
}; >XA#/K
g5H+2lSC
private static Sort[] impl=new Sort[]{ idV4hMF9
new InsertSort(), nU/v(lN
new BubbleSort(), )@Ly{cw
new SelectionSort(), xl s_g/Q
new ShellSort(), B4I|"5G2y
new QuickSort(), &K}!R$[,:P
new ImprovedQuickSort(), ($]y*|Obn
new MergeSort(), D=e&"V a
new ImprovedMergeSort(), JGJQ5zt
new HeapSort() bA1uh]oB
}; !\CoJ.5=
N[czraFBD}
public static String toString(int algorithm){ m7fmQUk
return name[algorithm-1]; z!eY=G'
} \6*3&p
C";F's)
public static void sort(int[] data, int algorithm) { ?DA,]aa-
impl[algorithm-1].sort(data); @2]_jW
} {3'z}q
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public static interface Sort { ]7Tjt A.\q
public void sort(int[] data); ?HttqK)
} 2?#IwT'
rm<(6zY
public static void swap(int[] data, int i, int j) { 0d~>zKho
int temp = data; byoDGUv
data = data[j]; l$z\8]x
data[j] = temp; | x/,
} \2@OS6LUe
} 94LFElE3