[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; gUCv#:
} ,c6ID|\
int i1=l; oSt-w{!
int i2=mid+1; EeKEw Sg
for(int cur=l;cur<=r;cur++){ r}P{opn$t
if(i1==mid+1) f;6a4<bz
data[cur]=temp[i2++]; J%3%l5/
else if(i2>r) Z^AACKME
data[cur]=temp[i1++]; i`Es7 }
else if(temp[i1] data[cur]=temp[i1++]; }`yIO"{8n
else MOyQ4<_
data[cur]=temp[i2++]; un[Z$moN"
} #5T+P8
} +"a .,-f!
~)}npS;
} DL2gui3
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改进后的归并排序: POc< G^
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package org.rut.util.algorithm.support; "}|n;:r
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import org.rut.util.algorithm.SortUtil; `I<*R0Qe
!E> *Mn
/** ;y?,myO
* @author treeroot \{n]&IjA
* @since 2006-2-2 i 4eb\j
* @version 1.0 1P4jdp=~
*/ oa+Rr&t'
public class ImprovedMergeSort implements SortUtil.Sort { 0?ZJJdI3
_ 9Tv*@
private static final int THRESHOLD = 10; q[l},nw
)k3zOKZ;
/* K!k,]90Ko
* (non-Javadoc) H;}V`}c<`
* K%>uSS?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9xC,i )
*/ Q5iuK#/
public void sort(int[] data) { `w]=xe
int[] temp=new int[data.length]; &`<j!xlG
mergeSort(data,temp,0,data.length-1); 8(D>ws$
} w@4q D
^l ~i>:V
private void mergeSort(int[] data, int[] temp, int l, int r) { S(Xab_DT)H
int i, j, k; K3TMTY<p
int mid = (l + r) / 2; M=e]v9
if (l == r) )=;0
return; `RfhxzI
if ((mid - l) >= THRESHOLD) cgm]{[f
mergeSort(data, temp, l, mid); ]~)FMWQz-
else _odP:
insertSort(data, l, mid - l + 1); X<_(gg
if ((r - mid) > THRESHOLD) I* \o
mergeSort(data, temp, mid + 1, r); '6fMF#X4F
else %K /=7
insertSort(data, mid + 1, r - mid); $)mE"4FE
v-X1if1%
for (i = l; i <= mid; i++) { (H<S&5[
temp = data; sn/^#Aa=N
} _{KQQ5k\
for (j = 1; j <= r - mid; j++) { R|ViLty
temp[r - j + 1] = data[j + mid]; Tv3Bej
} ^x4I
int a = temp[l]; !Z,h5u\.w
int b = temp[r]; b-@VR
for (i = l, j = r, k = l; k <= r; k++) { ?Il$f_"B:
if (a < b) { E:(flW=
data[k] = temp[i++]; ^:\|6`{n
a = temp; G#8HY VF
} else { qn6Y(@<[
data[k] = temp[j--]; W{At3Bfy
b = temp[j]; [(w_!|S
} ^/2n[orl5
} &n6mXFF#>P
} V(A6>0s$|
7<oLe3fbM
/** a [iC!F2
* @param data Jt.dR6,
* @param l q*\#HC
* @param i uv}[MXOP
*/ ,+KZn}>
private void insertSort(int[] data, int start, int len) { 7Nw7a;h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;-lk#D?n9
} +L!-JrYHS4
} \('8_tqI"
} Y>{K2#k
} RN'|./N
|%g^6RN
堆排序： Ni'vz7j
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package org.rut.util.algorithm.support; c</d1xT
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import org.rut.util.algorithm.SortUtil; s9PD[u/y
amK?LDf]
/** Ajr]&H4
* @author treeroot ce/Rzid
* @since 2006-2-2 bPAp0}{Fu
* @version 1.0 xXE/pIXw
*/ PtCwr)B,
public class HeapSort implements SortUtil.Sort{ -wy$ ?Ha
=K=FzV'_~
/* (non-Javadoc) 0iinr:=u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T/V8&'^i
*/ gdRwh
public void sort(int[] data) { ^TJn&k
MaxHeap h=new MaxHeap(); YW}q@AY7
h.init(data); (!&cfabL
for(int i=0;i h.remove(); t]#y}V
System.arraycopy(h.queue,1,data,0,data.length); h-=3b
} =da_zy
>;dMumX
private static class MaxHeap{ { ,/mQ3
3 ~0Z.!O
void init(int[] data){ a=&a)FR
this.queue=new int[data.length+1]; j` 9pZAF
for(int i=0;i queue[++size]=data; QDRSQ[\
fixUp(size); RRqHo~*0
} j8$*$|
} $U<so{xn%
ns9iTU)
private int size=0; znw\Dn?g
@Nn9-#iW
private int[] queue; Pdmfn8I]%
6&S;Nrg9
public int get() { (n05MwKu\
return queue[1]; D+]#qS1q
} CDQ}C=4
M2(+}gv;7p
public void remove() { \]e"#"v}}_
SortUtil.swap(queue,1,size--); 2K'3ry)[y
fixDown(1); ^I@1y}xi
} ZWQrG'$?o8
file://fixdown k]!Fh^O~,
private void fixDown(int k) { UJ1iXV[h"
int j; hW$B;
while ((j = k << 1) <= size) { V~tq _
if (j < size %26amp;%26amp; queue[j] j++; 1hw1AJ}(F
if (queue[k]>queue[j]) file://不用交换 F=U3o=-:
break; ,o& &d.
SortUtil.swap(queue,j,k); ^&MMtWR
k = j; $J>GCY
} acz8 H0cS
} %Wkvo-rOq
private void fixUp(int k) { ;t{Ew+s
while (k > 1) { dFFJw[$8w
int j = k >> 1; nR-`;lrF~
if (queue[j]>queue[k]) XZLo*C!MG
break; @tWyc%t
SortUtil.swap(queue,j,k); cJd~UQ<k
k = j; bYGK}:T8U
} rn#FmM
} :3M2zV cf
Q3vC^}Dmr
} uV!Ax*'
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} i[/g&fx
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SortUtil： >!MOgLO3
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package org.rut.util.algorithm; sy=M#WGS
2F[smUL
import org.rut.util.algorithm.support.BubbleSort; f^z~{|%l!
import org.rut.util.algorithm.support.HeapSort; wWv")dk3i
import org.rut.util.algorithm.support.ImprovedMergeSort; I&?(=i)N
import org.rut.util.algorithm.support.ImprovedQuickSort; q{5wx8_U
import org.rut.util.algorithm.support.InsertSort; O}I8P")m
import org.rut.util.algorithm.support.MergeSort; =T;>$&qs
import org.rut.util.algorithm.support.QuickSort; D0Yl?LU3
import org.rut.util.algorithm.support.SelectionSort; ^AkVmsv;;
import org.rut.util.algorithm.support.ShellSort; mD{<Lp=
DvCs 5
/** #5-5N5-1
* @author treeroot u@tJu'X
* @since 2006-2-2 YjN2 ,Xi
* @version 1.0 ! /;@kXN
*/ Fk@A;22N
public class SortUtil { bmgK6OyVR
public final static int INSERT = 1; /. GHR
public final static int BUBBLE = 2; FtXd6)_S
public final static int SELECTION = 3; }CnqJ@>C5
public final static int SHELL = 4; R("g ]
public final static int QUICK = 5; \>0%E{CR
public final static int IMPROVED_QUICK = 6; wDswK "T
public final static int MERGE = 7; T+ey>[
public final static int IMPROVED_MERGE = 8; ,ef"S r
public final static int HEAP = 9; }'mVD^<+
/` 891(f,
public static void sort(int[] data) { P0NGjS|Z{
sort(data, IMPROVED_QUICK); _PD RUJ
} X]ow5{e
private static String[] name={ Dnn$-W|NC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gKy@$at&
}; VU3xP2c:
l!CWE
private static Sort[] impl=new Sort[]{ {j i;~9'Q
new InsertSort(), c6FKpdn%
new BubbleSort(), "~jSG7h
new SelectionSort(), 0`.3`Mk
new ShellSort(), F4'g}yOLd
new QuickSort(), qI;"yG-x-
new ImprovedQuickSort(), X_GR{z%
new MergeSort(), "9,z"k
new ImprovedMergeSort(), /cHd&i,>
new HeapSort() [lZo'o
}; ,RIGV[u
M:x?I_JG8
public static String toString(int algorithm){ &~VWh}=r
return name[algorithm-1]; sk !92mQ
} v$c*3H.seM
fq(r,h=|
public static void sort(int[] data, int algorithm) { 4Kjrk7GAx
impl[algorithm-1].sort(data); ^*.S7.;2o
} 9s\(yC8h
V\Oe]w
public static interface Sort { ^%l~|w
public void sort(int[] data); +]Ca_`
} Y2709LWmP
i bAZ*I
public static void swap(int[] data, int i, int j) { Ncr38~;w
int temp = data; ^% y<7>%
data = data[j]; #eSVFD5ZU
data[j] = temp; ^DVj_&~
} d'ddxT$GG
} ;AyE(|U+