[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; ;J3az`
} IrU}%ZVV
int i1=l; s)q;{wz
int i2=mid+1; <~BheGmmy
for(int cur=l;cur<=r;cur++){ jiPV ]aVN
if(i1==mid+1) z.f~wAT@<
data[cur]=temp[i2++]; 2}P<}-?6
else if(i2>r) e2~i@vq
data[cur]=temp[i1++]; YadY?o./
else if(temp[i1] data[cur]=temp[i1++]; .!kqIx*3
else oWVlHAPj
data[cur]=temp[i2++]; fu/v1Nhm
} w, u`06
} [c@14]e
}hOExTz
} 3AWNoXh
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改进后的归并排序: 9,|&+G$
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package org.rut.util.algorithm.support; H4'xxsx
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import org.rut.util.algorithm.SortUtil; Ws[[Me,=
p<*\f
/** jV^Dj
* @author treeroot 1]r+$L3
* @since 2006-2-2 irNGURLm
* @version 1.0 !m"(SJn"
*/ Za{sT&(|
public class ImprovedMergeSort implements SortUtil.Sort { oLcOp.8h[
L 6){wQ%c
private static final int THRESHOLD = 10; /i+8b(x
"1rZwFI0l
/* euHX7
* (non-Javadoc) }}v04~
* 8Ua;< h%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %J\1W"I?
*/ kW&{0xkGR
public void sort(int[] data) { <o5+*X
int[] temp=new int[data.length]; RaFk/mSw
mergeSort(data,temp,0,data.length-1); 5B{O!SNd
} G0Wzx)3]
Z3=DM=V;v
private void mergeSort(int[] data, int[] temp, int l, int r) { EJYfk?(B
int i, j, k; &$fe%1#
int mid = (l + r) / 2; F"9f6<ge
if (l == r) )J+vmY~&
return; SGMLs'D
if ((mid - l) >= THRESHOLD) 5gWn{[[e)y
mergeSort(data, temp, l, mid); =:(8F*Q
else 8Z>ZjNG
insertSort(data, l, mid - l + 1); uY;-x~Z
if ((r - mid) > THRESHOLD) 7SE=otZ>
mergeSort(data, temp, mid + 1, r); 7>EjP&l
else k*\=IacX0
insertSort(data, mid + 1, r - mid); E)%]?/w
hQrO8T?2
for (i = l; i <= mid; i++) { z#b31;A@$
temp = data; Zs!)w9y&V
} WF<0QH
for (j = 1; j <= r - mid; j++) { ^ MkT">
temp[r - j + 1] = data[j + mid]; 6.|f iQs]
} vyT$IdV2
int a = temp[l]; CqDMq!
int b = temp[r]; HPs$R[
for (i = l, j = r, k = l; k <= r; k++) { 5:SfPAx
if (a < b) { w}pFa76rm
data[k] = temp[i++]; C(C4R+U
a = temp; pLL ^R
} else { Dq+rEt
data[k] = temp[j--]; 67 >*AL
b = temp[j]; 94"R&|
} pU)wxv[~
} ]>K%,}PS
} 7,ODh-?ez
tsq]QTA*
/** ^<xpp.eY
* @param data \}t(g}7T
* @param l `bO+3Y'5
* @param i yB(^t`)}N
*/ ]c8lZO>
private void insertSort(int[] data, int start, int len) { 0Z#&!xTb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3/o-\wWO
} ZbCu -a{v
} DGdSu6s$
} -8Z%5W`
} >1xlP/4jx
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堆排序： M~;Ww-./
hRSRz5 J}
package org.rut.util.algorithm.support; 5SFeJBS
0*W=u-|s6
import org.rut.util.algorithm.SortUtil; %WHue
f;#hcRSH
/** UO8#8
* @author treeroot Z2`(UbG}
* @since 2006-2-2 o <8L,u(U
* @version 1.0 $zq`hI!1
*/ Fsv%=E{
public class HeapSort implements SortUtil.Sort{ I(ds]E ;_E
Z6SM7?d
/* (non-Javadoc) <9YRSE[Ed
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3t[2Bd
*/ f&B&!&gZ
public void sort(int[] data) { n_sCZ6uXEQ
MaxHeap h=new MaxHeap(); o6
h.init(data); N54U [sy
for(int i=0;i h.remove(); 2@Jw?+}vr
System.arraycopy(h.queue,1,data,0,data.length); Lllyx20U
} PMjqcdBzm
fZH:&EP
private static class MaxHeap{ F))+a&O
~oz8B^7i;
void init(int[] data){ #/!a=0
this.queue=new int[data.length+1]; OT{wqNI
for(int i=0;i queue[++size]=data; 6~V$0Y>]
fixUp(size); YY{S0jnhF
} FkR9-X<
} _!H{\kU
=yOIP@
private int size=0; =9FY;9
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private int[] queue; n !]_o
X*1vIs;[@
public int get() { Ki{&,:@
return queue[1]; Uaog_@2n,
} {e0cc1Up}
v/\l
public void remove() { :CNWHF4$
SortUtil.swap(queue,1,size--); ZY+NKb_
fixDown(1); {LVii}<
} { :'#Ts<
file://fixdown `$SX%AZA
private void fixDown(int k) { )FGm5-K@
int j; ^tIs57!
while ((j = k << 1) <= size) { EKhwrBjS
if (j < size %26amp;%26amp; queue[j] j++; /`>BPQH`}
if (queue[k]>queue[j]) file://不用交换 <H`&Zqqk
break; xq-R5(k
SortUtil.swap(queue,j,k); /=A^@&:_#
k = j; +'Pf|S
} p]:5S_$
} #GT/Q3{C
private void fixUp(int k) { u)y6$
while (k > 1) { bEyZRG
int j = k >> 1; .&=nP?ZPC6
if (queue[j]>queue[k]) ,]\L\V
break; NGtSC_~d
SortUtil.swap(queue,j,k); 7'z{FSS
k = j; w`&~m:R
} "detDB
} s"?Z jV)`
F\F_">5
} f1y3l1/
f/&gR5
} vzM8U>M
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SortUtil： (4o_\&
wP8Wx~Q=
package org.rut.util.algorithm; 4\a KC%5
#mLF6"A
import org.rut.util.algorithm.support.BubbleSort; c+,F)i^`
import org.rut.util.algorithm.support.HeapSort; ozwPtF5
import org.rut.util.algorithm.support.ImprovedMergeSort; "MQy>mD6
import org.rut.util.algorithm.support.ImprovedQuickSort; b(+M/O>I
import org.rut.util.algorithm.support.InsertSort; "bZ%1)+
import org.rut.util.algorithm.support.MergeSort; 109dB$+$
import org.rut.util.algorithm.support.QuickSort; -b"mx"'?
import org.rut.util.algorithm.support.SelectionSort; 5RXZ$/
import org.rut.util.algorithm.support.ShellSort; fT.18{'>
pyYm<dn
/** ^0py
* @author treeroot N}Q%y(O^
* @since 2006-2-2 0Am&:kX't
* @version 1.0 uP2e/a
*/ dU<\FW_
public class SortUtil { jcD_<WSe
public final static int INSERT = 1; ~x^E kE
public final static int BUBBLE = 2; 2kb<;Eh`G
public final static int SELECTION = 3; E j`
public final static int SHELL = 4; o|O730"2F
public final static int QUICK = 5; z)p( l!
public final static int IMPROVED_QUICK = 6; ui%B|b&&
public final static int MERGE = 7; cu*8,*FU
public final static int IMPROVED_MERGE = 8; 6RV42r^pf
public final static int HEAP = 9; lHQ:LI
`,a6su (?
public static void sort(int[] data) { U27YH1OK
sort(data, IMPROVED_QUICK); KtTv0[66
} &0cfTb)dG
private static String[] name={ p^QZGu-.W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V,:^@ 7d
}; 4o?_G[
z#9Tg"8]
private static Sort[] impl=new Sort[]{ }zC9;R(E
new InsertSort(), d1]CN6 7{G
new BubbleSort(), 3+vbA;R
new SelectionSort(), N$]B$vv
new ShellSort(), ehCGu(=
new QuickSort(), )N$T&
new ImprovedQuickSort(), Nc;cb
new MergeSort(), d1CQ;,Df<
new ImprovedMergeSort(), @9#l3
new HeapSort() c IK
}; %d?.v_Hu0
S;@nPzhc
public static String toString(int algorithm){ vDI$ QUMD6
return name[algorithm-1]; t7GK\B8:
} 1%Hc/N-
1.Kun !w
public static void sort(int[] data, int algorithm) { ayF+2(vch)
impl[algorithm-1].sort(data); xb{G:v
} r+v?~m!
{<ms;Oi'
public static interface Sort { p1tqwV
public void sort(int[] data); IE*eDj
} >D]g:t@v
]90BIJ]*c
public static void swap(int[] data, int i, int j) { 4^uQB(}Z
int temp = data; c_"=G#^9@i
data = data[j]; {BV0Y.O
data[j] = temp; E;v#'
} 9u[^9tL+D
} k-it#'ll{x