[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; 6oQSXB@
} -=+@/@nV
int i1=l; {p70( ]v
int i2=mid+1; 1&wI*4
for(int cur=l;cur<=r;cur++){ ) vKZs:
if(i1==mid+1) Q;'{~!=
data[cur]=temp[i2++]; h"/y$
else if(i2>r) 0fpxr`
data[cur]=temp[i1++]; }kCaTI?@#
else if(temp[i1] data[cur]=temp[i1++]; :M |<c9I
else qZcRK9l]F1
data[cur]=temp[i2++]; mfI>1W(
} p1O[QQ|
} 7a<-}>sU
HqZ3]
} ?FRuuAS
;:Yz7<>Y,
改进后的归并排序: t& *K
Y[8GoqE|
package org.rut.util.algorithm.support; L PDx3MS
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import org.rut.util.algorithm.SortUtil; T+0Z2H
"E6*.EtTN#
/** fBi6% #
* @author treeroot X<j(AAHE
* @since 2006-2-2 $U]KIHb
* @version 1.0 _UqE -+&
*/ nKO4o8js{{
public class ImprovedMergeSort implements SortUtil.Sort { D=0^"7K
-VO&#Mt5u
private static final int THRESHOLD = 10; ?_VoO
4$wn8!x2|
/* ^`MGlI}
* (non-Javadoc) f\{ynC2m
* -%g$~MZ?'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5g$]ou
*/ }%@q; "9`
public void sort(int[] data) { 8}^R jMgI
int[] temp=new int[data.length]; d hp-XIA;
mergeSort(data,temp,0,data.length-1); 9Sy|:J0
} (sfy14>\
Ei Yj`P
private void mergeSort(int[] data, int[] temp, int l, int r) { ZSUbPz
int i, j, k; W{1"
int mid = (l + r) / 2; $$tFP"pZ
if (l == r) d<@SRHP(
return; VsrYU@V
if ((mid - l) >= THRESHOLD) ^_Ap?zn
mergeSort(data, temp, l, mid); }+F&=-P)
else [ 1$p}x
insertSort(data, l, mid - l + 1); GgNqci,
if ((r - mid) > THRESHOLD) &6#>a"?"
mergeSort(data, temp, mid + 1, r); FS1> J%P
else 3rUuRsXn
insertSort(data, mid + 1, r - mid); 7@6B\':
[2 yxTK
for (i = l; i <= mid; i++) { g9XAUZe
temp = data; /ta5d;@
} /|HVp
for (j = 1; j <= r - mid; j++) { t 5{Y'
temp[r - j + 1] = data[j + mid]; h5do?b v!
} uDWxIP,m
int a = temp[l]; oQS_rv\Ber
int b = temp[r]; 3R=R k
for (i = l, j = r, k = l; k <= r; k++) { ~hk;OB;
if (a < b) { E;vF :?|
data[k] = temp[i++]; G""L1?
a = temp; +pefk+
} else { vK10p)ZV
data[k] = temp[j--]; 9bxBm
b = temp[j]; ,1!~@dhs
} W~QH"Sq
} |RA|nu
} &-hz&/A,
>B~vE2^tQ~
/** ?: XY3!{
* @param data A@o:mZ+XN(
* @param l 8=Z]?D=
* @param i 6M/*]jLq4
*/ yltzf #%
private void insertSort(int[] data, int start, int len) { wyVQV8+&>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A;'*>NS
} 'ZUB:R@[
} p[J 8 r{'
} ,e{|[k
} A$a>=U|Z8
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堆排序： O5lP92],
v1m'p:7uGB
package org.rut.util.algorithm.support; itpljh
A{QXzoWkg0
import org.rut.util.algorithm.SortUtil; ]5_6m;g
%_>+K;<
/** S Y7'S#
* @author treeroot l"ZfgJ}W
* @since 2006-2-2 Wi5rXZS
* @version 1.0 M#U#I:z%
*/ e]qbh_A
public class HeapSort implements SortUtil.Sort{ (0cL! N;;
bY>JLRQJ-
/* (non-Javadoc) c@ea ;Cv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pp!>:%
*/ 1/l;4~p7'
public void sort(int[] data) { {Iu9%uR>@
MaxHeap h=new MaxHeap(); jb5nL`(j$
h.init(data); KXtc4wra
for(int i=0;i h.remove(); TlA*~HG<Q
System.arraycopy(h.queue,1,data,0,data.length); iax6o+OG|
} F\H^=P
Jm5&6=
private static class MaxHeap{ bTrQ(qp
-2\%?A6L
void init(int[] data){ j0]|$p
this.queue=new int[data.length+1]; /;K?Y#mf~j
for(int i=0;i queue[++size]=data; fho$:S
fixUp(size); [tP6FdS/M=
} \`MX\OR
} 1I1Z),
Og8'K=O#
private int size=0; |fd}B5!c
GY[+HgT
private int[] queue; Z ^w5x:
JOA_2qa>\
public int get() { Bp.z6x4
return queue[1]; QSNLo_z
} +~H mPQ
' >F_y t9
public void remove() { 82q_"y>6
SortUtil.swap(queue,1,size--); F[65)"^
fixDown(1); }$zJdf,\
} [HV9KAoA
file://fixdown a BHV
private void fixDown(int k) { j+E[[
int j; F9Bj$`#)
while ((j = k << 1) <= size) { RwR.*?#
if (j < size %26amp;%26amp; queue[j] j++; G.}Ex!8R7_
if (queue[k]>queue[j]) file://不用交换 _s&sA2r<
break; c[DC
SortUtil.swap(queue,j,k); ju@5D h
k = j; j$f`:A
} [p%OIqC`pB
} oV7A"8L^a
private void fixUp(int k) { [)ybPIv]
while (k > 1) { &7gE=E(M
int j = k >> 1; pR VL}^Rk
if (queue[j]>queue[k]) >UQ`@GdafR
break; KioD/
SortUtil.swap(queue,j,k); ZYBK'&J4m
k = j; h>l
} d:x=g i!
} }&o*ZY-1
LhM{d
} t\p_QWnF
!{L6 4qI
} S(5aJ[7Zm
DJF-J#
SortUtil： 6J\Yi)v<
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package org.rut.util.algorithm; g@ ZZcBx
-i}@o1o\
import org.rut.util.algorithm.support.BubbleSort; b,7@)sZ*
import org.rut.util.algorithm.support.HeapSort; @+S5"W
import org.rut.util.algorithm.support.ImprovedMergeSort; |0wUOs*5
import org.rut.util.algorithm.support.ImprovedQuickSort; 9%VNzPzf
import org.rut.util.algorithm.support.InsertSort; [P*w$Hn
import org.rut.util.algorithm.support.MergeSort; h2Pvj37
import org.rut.util.algorithm.support.QuickSort; Ef}rMkv
import org.rut.util.algorithm.support.SelectionSort; rdL>yT/A
import org.rut.util.algorithm.support.ShellSort; `B^HW8
b;[u=9ez
/** gda3{g7<)
* @author treeroot u/@dWeY[]
* @since 2006-2-2 aXSTA,%
* @version 1.0 wN])"bmB
*/ .-:R mYGR
public class SortUtil { `GG PkTN
public final static int INSERT = 1; U =()T}b>
public final static int BUBBLE = 2; &UWSf
public final static int SELECTION = 3; )eFq0+6*)
public final static int SHELL = 4; ^c9~~m16+
public final static int QUICK = 5; *d,u)l :S
public final static int IMPROVED_QUICK = 6; 9tnW:Nw~
public final static int MERGE = 7; D;VFMP
public final static int IMPROVED_MERGE = 8; =a_B'^`L
public final static int HEAP = 9; w:}RS.AK
8#Q=CTjF
public static void sort(int[] data) { iCouGd}
sort(data, IMPROVED_QUICK); {$<X\\&r
} >D';i\2j&
private static String[] name={ d.7pc P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |<@X* #X5
}; ZW}0{8Dk
*lN>RWbM%
private static Sort[] impl=new Sort[]{ &k5 Z|d|
new InsertSort(), >^@/Ba$h
new BubbleSort(), XK)qDg
new SelectionSort(), _Z:WgO].
new ShellSort(), hr8v O"tZN
new QuickSort(), CbJ ]}Z
new ImprovedQuickSort(), |WiK*
new MergeSort(), T/%s7!E
new ImprovedMergeSort(), \h%/Cp+p
new HeapSort() C^po*(W6
}; ?PIOuN=
:VPZGzK4
public static String toString(int algorithm){ <B;l).[6
return name[algorithm-1]; r )cGee
} e1dT~l
5o~;0K]
public static void sort(int[] data, int algorithm) { Ksq{=q-T
impl[algorithm-1].sort(data); tZtyx;EP
} (8<U+)[tPy
1)aB']K%
public static interface Sort { :bLLN
public void sort(int[] data); FuNc#n>
} CL*i,9:NR
c}II"P
public static void swap(int[] data, int i, int j) { R}Ih~zw
int temp = data; |wKC9O@%
data = data[j]; Tn+6:<OFdO
data[j] = temp; 9L}=xX`>?
} ZJ} V>Bu-
} +2kJuoj: