[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; lcON+j
} h@7FY
int i1=l; ?^' 7+8C*J
int i2=mid+1; I O%6 O
for(int cur=l;cur<=r;cur++){ dAP|:&y@
if(i1==mid+1) 2LCB])X
data[cur]=temp[i2++]; !>x|7
else if(i2>r) lX:|iB
data[cur]=temp[i1++]; OE)~yKy
else if(temp[i1] data[cur]=temp[i1++]; ?EMK8;
else X.ONa_
data[cur]=temp[i2++]; 2c<&eX8"
} $=sXAK9
} IUGz =%[
z sQo$p
} i$^)UZJ&0
[=uo1%
改进后的归并排序: eZ a:o1y
qLncn}oNM
package org.rut.util.algorithm.support; %zC[KE*~
v]2S`ffP
import org.rut.util.algorithm.SortUtil; q,<[hBri-
F Kc;W
/** E}CiQUx
* @author treeroot R cY>k
* @since 2006-2-2 *IlaM'[*
* @version 1.0 8T;IZ(s
*/ QYXx:nIrg
public class ImprovedMergeSort implements SortUtil.Sort { I~PDaZP
B}OY/J/*8
private static final int THRESHOLD = 10; Gx?+9CV
p6EDQwlf
/* +c:3o*
* (non-Javadoc) 4A{|[}!
* d {lP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?:^mBb)T
*/ n?#!VN3
public void sort(int[] data) { Z>F^C}8f
int[] temp=new int[data.length]; Nd:R" p*8
mergeSort(data,temp,0,data.length-1); \u`)kJ5o1
} |1Dc!V'?"
M|T4~Q U&
private void mergeSort(int[] data, int[] temp, int l, int r) { "_L?2ta
int i, j, k; ci,+Bjc
int mid = (l + r) / 2; DG(7|`(aY
if (l == r) +y[@T6_
return; q<e&0u4
if ((mid - l) >= THRESHOLD) nGZX7Fx5
mergeSort(data, temp, l, mid); J2GcBzRH
else )g| BMmB
insertSort(data, l, mid - l + 1); 8B!aO/Km
if ((r - mid) > THRESHOLD) :/YO ni1h
mergeSort(data, temp, mid + 1, r); JnD{J`:
else &a> lWE
insertSort(data, mid + 1, r - mid); Y izE5[*
>Sk[vI0Y
for (i = l; i <= mid; i++) { PZ:u_*Vu`
temp = data; I^*'.z!4Q
} 1`f_P$&Z_J
for (j = 1; j <= r - mid; j++) { @ \.;b9
temp[r - j + 1] = data[j + mid]; "SWMk!
} -9P2`XQ^
int a = temp[l]; |ifHSc.j<
int b = temp[r]; C>^D*C(
for (i = l, j = r, k = l; k <= r; k++) { 9z m|Lbj
if (a < b) { m(D]qYwh
data[k] = temp[i++]; X{Yw+F,j
a = temp; >QQ(m\a$
} else { KYJ1}5n
data[k] = temp[j--]; (lA.3 4.p
b = temp[j]; VCNT4m
} Mro4`GL
} gLD`wfZR
} {!ZyCi19
^jdL@#k00
/** |wxGpBau
* @param data ~KjJ\b)R
* @param l ;:&?=d
* @param i VBoMT:#
*/ HCA{pR`
private void insertSort(int[] data, int start, int len) { -ML6d&cm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B,$l4m4
} &znH!AQ0
} <>SdVif]
} wyc D>hc
} )\/ =M*
yT OyDm-
堆排序： XR# ;{p+b
6@;ha=[+
package org.rut.util.algorithm.support; TDK@)mP
wWW~_zP0
import org.rut.util.algorithm.SortUtil; ]rd/;kg.S
4C_c\;d
/** huFz97?y(
* @author treeroot H{ M)-
* @since 2006-2-2 `%K`gYhG1
* @version 1.0 iMP
*/ Zp`T
public class HeapSort implements SortUtil.Sort{ dLh6:Gh8_I
|fsm8t<~8
/* (non-Javadoc) -*VKlZ8-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -H(vL=
*/ H(u+#PIIw
public void sort(int[] data) { d<p2/aA
MaxHeap h=new MaxHeap(); @B1{r|-<^
h.init(data); SDJH;c0
for(int i=0;i h.remove(); Pd=,$UQp
System.arraycopy(h.queue,1,data,0,data.length); aA*9,
} l4'~}nn(Y
>}+Q:iNQ)2
private static class MaxHeap{ a^nAZ
uq7T{7~<
void init(int[] data){ Os),;W0w4
this.queue=new int[data.length+1]; V}8$p8#<@
for(int i=0;i queue[++size]=data; #m. AN
fixUp(size); >O{7/)gS^
} %n$^-Vc&
} 'E]A.3-Mt
y%BX]~
private int size=0; 9G+f/k,P
S0w> hr
private int[] queue; 7Ur?ep
,\ldz(D?+
public int get() { ,TC~~EWq
return queue[1]; t\y-T$\\
} ``4wX-y
_g|acBF
public void remove() { h* .w"JO
SortUtil.swap(queue,1,size--); Ueyw;Y
fixDown(1); D5]{2z}k
} $3 8gs{+
file://fixdown 9BON.` |_
private void fixDown(int k) { 0Oxz3r%}r
int j; _vYzF+
while ((j = k << 1) <= size) { hY;_/!_
if (j < size %26amp;%26amp; queue[j] j++; Df=q-iq<{/
if (queue[k]>queue[j]) file://不用交换 ?C;JJ#Ho
break; ,+L KJl
SortUtil.swap(queue,j,k); SE`l(-tL
k = j; 8OAg~mQ15(
} \KM|f9-b
} }=GM?,7b
private void fixUp(int k) { F>Jg~ FD*
while (k > 1) { T0|H9>M
int j = k >> 1; g()m/KS<
if (queue[j]>queue[k]) I-:`cON=G
break; 1bRL"{m^)-
SortUtil.swap(queue,j,k); m6n hC
k = j; 7kz-V.
} (([I]q
} 'DAltr<
EF;,Gjh5p
} tV`&-H
@-6?i)
} 7:o+iP46
c^S&F9/U*
SortUtil： :C%47qv
,P@QxnQ
package org.rut.util.algorithm; a$+#V=bA
|=3 *;}
import org.rut.util.algorithm.support.BubbleSort; L>nO:`>h
import org.rut.util.algorithm.support.HeapSort; 60PYCqWc
import org.rut.util.algorithm.support.ImprovedMergeSort; `pYE[y+
import org.rut.util.algorithm.support.ImprovedQuickSort; 1g i}H)
import org.rut.util.algorithm.support.InsertSort; $FCw$+w
import org.rut.util.algorithm.support.MergeSort; v*DFiCQD
import org.rut.util.algorithm.support.QuickSort; 1URsHV!xcM
import org.rut.util.algorithm.support.SelectionSort; qJMp1DC
import org.rut.util.algorithm.support.ShellSort; hEcYpng~
E& ]_U$
/** n4*'B*
* @author treeroot 8|<f8Z65!
* @since 2006-2-2 Wf1-"Q
* @version 1.0 ;U7t
*/ b-b;7a\N
public class SortUtil { g =\13#F
public final static int INSERT = 1; EG1x
public final static int BUBBLE = 2; `q1}6U/k
public final static int SELECTION = 3; *]9XDc]{j1
public final static int SHELL = 4; v<fWc971
public final static int QUICK = 5; Kz^hQd
public final static int IMPROVED_QUICK = 6; Vx(;|/:
public final static int MERGE = 7; UJs?9]x>
public final static int IMPROVED_MERGE = 8; dh,7iQ s
public final static int HEAP = 9; +}]wLM}\UF
"b;k.Fx
public static void sort(int[] data) { B#4S/d{/
sort(data, IMPROVED_QUICK); Px#4pmz
} 73#9NZR
private static String[] name={ )XZ,bz*jn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :\T_'Shq
}; Nuo<` 6mV@
lc-*8eS
private static Sort[] impl=new Sort[]{ D2-O7e
new InsertSort(), dK7 ^
new BubbleSort(), 6!o/~I#
new SelectionSort(), {&b-}f"m
new ShellSort(), KKMWD\
new QuickSort(), ],#ZPUn
new ImprovedQuickSort(), C890+(D~
new MergeSort(), Ut=0~x.=<
new ImprovedMergeSort(), F6h/0i
new HeapSort() B)(w%\M4^
}; c{ZqQtfM
n/:Z{
public static String toString(int algorithm){ wf^cyCR0
return name[algorithm-1]; {S# 5g2
} _2xuzmz0
nFSG<#x\
public static void sort(int[] data, int algorithm) { m./*LXU
impl[algorithm-1].sort(data); <`b|L9
} U@MOvW)
E,Dlaq
public static interface Sort { <kk'v'GW@
public void sort(int[] data); `_6@3-%
} W>UjUq);
+# A|Zp<
public static void swap(int[] data, int i, int j) { J78Qj[v
int temp = data; SlM>";C\
data = data[j]; O{O9}]6
data[j] = temp; agGgJ@
} ~6=Wq64
} VN1#8{