[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; !wy Qk
} Y^DS~CrM
int i1=l; d#E]>:w9
int i2=mid+1; o}H7;v8H
for(int cur=l;cur<=r;cur++){ )jkX&7x
if(i1==mid+1) ?,~B@Kx
data[cur]=temp[i2++]; J%`-K"NB
else if(i2>r) u:#+R_0#97
data[cur]=temp[i1++]; \|9@*]6:
else if(temp[i1] data[cur]=temp[i1++]; pJ35M
else P(pw$ q$S
data[cur]=temp[i2++]; h{xC0NC)
} ParOWs~W/
} wz^Q,Od
Ojqbj0E9
} *y +T(73
s&:LY"[`
改进后的归并排序: L&V;Xvbu%
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package org.rut.util.algorithm.support; ~ED8]*H|`
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import org.rut.util.algorithm.SortUtil; 3aIP^I1
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/** |hBX"
* @author treeroot KW.*LoO
* @since 2006-2-2 v5STe`
* @version 1.0 9}p>='
*/ .?{rd3[ec
public class ImprovedMergeSort implements SortUtil.Sort { xVk|6vA7
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private static final int THRESHOLD = 10; QHOA__?
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/* G"w ?{W@
* (non-Javadoc) 0kxo
* "FA&Qm0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R gY-fc0
*/ r}kQ<SRx
public void sort(int[] data) { &)`xlIw}
int[] temp=new int[data.length]; i#Tm] ++
mergeSort(data,temp,0,data.length-1); Qvc "?yx8}
} zAT7^q^
Q;r9>E!
private void mergeSort(int[] data, int[] temp, int l, int r) { 48;6C g
int i, j, k; ct,B0(]
int mid = (l + r) / 2; X"_,#3Ko!
if (l == r) gc``z9@Xg
return; }uWIF|h~
if ((mid - l) >= THRESHOLD) 2ghTAsUx9
mergeSort(data, temp, l, mid); (gN[<QL
else *J^l r"%c
insertSort(data, l, mid - l + 1); o5=1
if ((r - mid) > THRESHOLD) Q9,H0r-%
mergeSort(data, temp, mid + 1, r); lS"g[O+
else t^eWFX
insertSort(data, mid + 1, r - mid); "|P8L| @*
irj{Or^k
for (i = l; i <= mid; i++) { g/Q"%GN,
temp = data; 6*yt^[W
} Qtj.@CGB
for (j = 1; j <= r - mid; j++) { eeKErpj8A
temp[r - j + 1] = data[j + mid]; zN}1Qh
} A+3,y<j\
int a = temp[l]; &o{=
int b = temp[r]; ~*:{U
for (i = l, j = r, k = l; k <= r; k++) { nnr g^F
if (a < b) { `/]Th&(5
data[k] = temp[i++]; tQ!p<Q= $)
a = temp; OZ{YQ}t{^1
} else { S$9>9!1>*
data[k] = temp[j--]; SN w3xO!;&
b = temp[j]; BET3tiHV
} B~S"1EE[
} _X ?W)]:
} Td!@i[6%H
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/** b{T". @b
* @param data 9A|deETa-
* @param l dnRS$$9#
* @param i 2R}9wDP
*/ -+1_ 1!
private void insertSort(int[] data, int start, int len) { 7G,{BBB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1Z9_sd~/6
} !~X[qT
} s?qRy 2
} %V r vu5
} e,j2#wjor
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堆排序： )ro3yq4??
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package org.rut.util.algorithm.support; y"N7r1Pf
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import org.rut.util.algorithm.SortUtil; ,&+"|,m
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/** 66A}5b4)]
* @author treeroot oW0A8_|9
* @since 2006-2-2 |>w>}w`~
* @version 1.0 cJb.@8^J
*/ 8:W,""
public class HeapSort implements SortUtil.Sort{ ;ZnSWIF2
;Y/{q B!
/* (non-Javadoc) um/2.Sn>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $U3|.4
*/ E0F8FR'
public void sort(int[] data) { P''5A6#5
MaxHeap h=new MaxHeap(); :.;pRz
h.init(data); 4<`Qyul-
for(int i=0;i h.remove(); t(<^of:
System.arraycopy(h.queue,1,data,0,data.length); K})=&<M0
} )SkJgzvC
bCv=Uo,+6
private static class MaxHeap{ ;rBd_
a/})X[2
void init(int[] data){ *,C[yg1P
this.queue=new int[data.length+1]; rL{3O4O
for(int i=0;i queue[++size]=data; j$2rU'
fixUp(size); cJ CKxj
} `2}Frw+?
} fW/G_
ixK&E#
private int size=0; RQaB_bg7
1|]IWX|
private int[] queue; Vjv~RNGF
1_AB;^
public int get() { dv?ael^
return queue[1]; [73 \jT
} i=m5M]Ef
Y|'0bujr
public void remove() { 9\yGv
SortUtil.swap(queue,1,size--); "c0I2wq
fixDown(1); Uavr>-
} Z*AT &7
file://fixdown GM1z@i\5
private void fixDown(int k) { }}R?pU_
int j; )@vhqVv?
while ((j = k << 1) <= size) { &sFEe<
if (j < size %26amp;%26amp; queue[j] j++; Xv1SRP#
if (queue[k]>queue[j]) file://不用交换 ,F&TSzH[@v
break; O)0}yF$0
SortUtil.swap(queue,j,k); @D?KS;#
k = j; c"nowbf
} hxCSE$f4
} |2i=oX(r|
private void fixUp(int k) { }01c7/DRP<
while (k > 1) { _*tU.x|DP
int j = k >> 1; K-_XdJ\
if (queue[j]>queue[k]) 74[wZDW|(
break; SJseP_-
SortUtil.swap(queue,j,k); GJu[af
k = j; e8WuAI86
} 4tQ~Z6Jn;
} nC:>1kt
aw%iO|M_
} UR3qzPm!0e
_T96.~Q
} ^{Vt
#8Bs15aV
SortUtil： u-8b,$@Z>'
S.<aCN<@
package org.rut.util.algorithm; p`dH4y]D
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import org.rut.util.algorithm.support.BubbleSort; #9(0.!v
import org.rut.util.algorithm.support.HeapSort; @3^D[
import org.rut.util.algorithm.support.ImprovedMergeSort; ?S*Cvr+=4
import org.rut.util.algorithm.support.ImprovedQuickSort; #[ H4`hZ
import org.rut.util.algorithm.support.InsertSort; &oz^dlw
import org.rut.util.algorithm.support.MergeSort; Az+k8=?
import org.rut.util.algorithm.support.QuickSort; [~aRA'qJ{V
import org.rut.util.algorithm.support.SelectionSort; j&(Yk"j+
import org.rut.util.algorithm.support.ShellSort; Ipp#{'Do
P{bRRn4Z
/** GiZv0>*x
* @author treeroot p\'0m0*
* @since 2006-2-2 6UAn#d9
* @version 1.0 ;+Dq3NE
*/ As}eI!
public class SortUtil { ?Iin/<y
public final static int INSERT = 1; 9wTN*y
public final static int BUBBLE = 2; jkQ%b.a
public final static int SELECTION = 3; G!u+~{g
public final static int SHELL = 4; {Vw\#/,
public final static int QUICK = 5; 6>yfm4o
public final static int IMPROVED_QUICK = 6; ~nVO%IxM4J
public final static int MERGE = 7; azs lNL
public final static int IMPROVED_MERGE = 8; gNWTzz<[f>
public final static int HEAP = 9; [%0{7pz}
8gHOs#\
public static void sort(int[] data) { 483/ZgzT`
sort(data, IMPROVED_QUICK); Nv~H797B
} $_ BoG
private static String[] name={ ~6Xr^An/Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |]Eli%mNe
}; F3?PlH:Y
kS7`g A
private static Sort[] impl=new Sort[]{ QX`T-)T e
new InsertSort(), nxjP4d>
new BubbleSort(), TQ,KPf$0U
new SelectionSort(), Z!& u_
new ShellSort(), /<R[X>]<F
new QuickSort(), mA?fCs
new ImprovedQuickSort(), L0Ycf|[s,
new MergeSort(), +W%3VV$
new ImprovedMergeSort(), %tE#%;Z
new HeapSort() 4:I'zR5
}; ^pysoaZCT_
svaclkT=
public static String toString(int algorithm){ *y0=sG1+D
return name[algorithm-1]; R1/h<I:
} .eHOG]H
:~{Nf-y0`1
public static void sort(int[] data, int algorithm) { Q,m&XpZ
impl[algorithm-1].sort(data); J#*%r)
} rRQKW_9mB
O a%ZlEUF
public static interface Sort { 8Y,imj\(v
public void sort(int[] data); xU!eT'Y
} &)$}Nk
?;YymD_
public static void swap(int[] data, int i, int j) { tRCz[M&
int temp = data; TPF5?
data = data[j]; [S_qi,
data[j] = temp; iD${7 _
} X{u\|e{
} -z~;f<+I`