[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; I@0z/4H``
} zoZ<)x=;
int i1=l; -t8hi+NK
int i2=mid+1; erx5j\
for(int cur=l;cur<=r;cur++){ ~;M)qR?]W
if(i1==mid+1) gjj 93
data[cur]=temp[i2++]; D|@bGN
else if(i2>r) T'ED$}N>~
data[cur]=temp[i1++]; 0xJ7M.
else if(temp[i1] data[cur]=temp[i1++]; )0#j\B
else D##+)`dK
data[cur]=temp[i2++]; 2+?T66 g
} sm 's-gD
} G2.|fp_}pG
pheE^jUr
} {=3J/)='
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改进后的归并排序: -S"5{N73
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package org.rut.util.algorithm.support; ZgV~W#t
&v^!y=Bt
import org.rut.util.algorithm.SortUtil; U|gpCy
{<qF}i:V
/** z]kwRWe`j
* @author treeroot I2f?xJ2/Z
* @since 2006-2-2 ~xGoJrF\
* @version 1.0 1T ( u
*/ Kv(z4z
public class ImprovedMergeSort implements SortUtil.Sort { *~p(GC
!^m%O0DT
private static final int THRESHOLD = 10; B:4Ka]{YO
I@2uF-
/* & _; y.!
* (non-Javadoc) 2w+U$6e C
* lnS(&`oh\=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L7'%;?Z
*/ UMV)wy|j
public void sort(int[] data) { @;vNX*-J
int[] temp=new int[data.length]; lT2 4JhJ#
mergeSort(data,temp,0,data.length-1); M)&Io6>
} ? ^M /[@
@q K]JK
private void mergeSort(int[] data, int[] temp, int l, int r) { a1Hz3y~S/
int i, j, k; HcRa`Sfc]/
int mid = (l + r) / 2; LL&ud_Y
if (l == r) 7A5p["?Z
return; U-i.(UyZ
if ((mid - l) >= THRESHOLD) vT|`%~Be
mergeSort(data, temp, l, mid); HPrq1QpK
else q:I$EpKf?Q
insertSort(data, l, mid - l + 1); j5Qo*p
if ((r - mid) > THRESHOLD) ,`k_|//}=
mergeSort(data, temp, mid + 1, r); K]c4"JJ
else kb71q:[
insertSort(data, mid + 1, r - mid); j^flwk
\v+u;6cx_
for (i = l; i <= mid; i++) { ~#R9i^Y
temp = data; 'JieIKu
} C|MQ $~5:w
for (j = 1; j <= r - mid; j++) { ,~COZi;R.D
temp[r - j + 1] = data[j + mid]; rcV-_+KE(B
} 8WL8/
int a = temp[l]; 0Vkl`DmeM.
int b = temp[r]; e ^Ds
for (i = l, j = r, k = l; k <= r; k++) { 'Gx$Bj
if (a < b) { NYwR2oX
data[k] = temp[i++]; G8nrdN-9
a = temp; .`jo/,?+O
} else { tF*szf|$-
data[k] = temp[j--]; QT! 4[,4
b = temp[j]; A4.4Dji,x
} *O,H5lwU
} {:Aw_z:'
} ;}qhc l+
`lO(s%HC
/** =<c#owe:m
* @param data Xa," 'r
* @param l )KE[!ofD
* @param i |?d#eQ9a
*/ #sTEQjJ,J
private void insertSort(int[] data, int start, int len) { 5c5oSy+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pd3,pQ
} Y4E/?37j
} >@_im6
} UDy(dn>J:J
} W3r?7!~
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堆排序： D-2.fjo9!
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package org.rut.util.algorithm.support; qH>`}/,P
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import org.rut.util.algorithm.SortUtil; L[g0&b%%-
:u6JjW[a)
/** !z 53OT!
* @author treeroot %ft &Q
* @since 2006-2-2 eg/<[ A:
* @version 1.0 MP^ d}FL
*/ (Glr\q]jF\
public class HeapSort implements SortUtil.Sort{ ;{#^MD MB
26I
/* (non-Javadoc) foRD{Hx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Os&n
*/ Su8|R"qU
public void sort(int[] data) { \25/$Ae}c
MaxHeap h=new MaxHeap(); cc}Key@D
h.init(data); :O-iykXyI
for(int i=0;i h.remove(); <IJu7t>
System.arraycopy(h.queue,1,data,0,data.length); xYfD()w<I
} +JRF0T
+k\Uf*wh
private static class MaxHeap{ }|\d+V2On
/PzcvN
void init(int[] data){ 31WC=ur5
this.queue=new int[data.length+1]; Vw tZLP36
for(int i=0;i queue[++size]=data; 6E~g#(8
fixUp(size); h.eM RdlO
} @L/o\pvc
} @I`C#~
R=Zn -q
private int size=0; 7F^#o-@=J
fu[K".
private int[] queue; 5cJ!"
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public int get() { ,Lpixnm]
return queue[1]; 0AK,&nbF
} 80b;I|-T,
\1"'E@+
public void remove() { /E;y,o75
SortUtil.swap(queue,1,size--); d}'U?6ob
fixDown(1); h `}}
} r]@0eb
file://fixdown /ID3s`D)
private void fixDown(int k) { Z@a9mFI?
int j; E/M_lvQ
while ((j = k << 1) <= size) { o*WY=
if (j < size %26amp;%26amp; queue[j] j++; dCyqvg6u
if (queue[k]>queue[j]) file://不用交换 (8$k4`T>
break; 1MlUG5
SortUtil.swap(queue,j,k); ?BA]7M(,4
k = j; 6W[}$#w
} IW=cym7
} {n#k,b&9B
private void fixUp(int k) { E>b2+;Jv
while (k > 1) { r3E!dTDWq
int j = k >> 1; G!w"{Bk?9
if (queue[j]>queue[k]) {8$=[;
break; %nN `|\
SortUtil.swap(queue,j,k); 5r~#0Zf*
k = j; Q;11N7+
} c'uhK8|
} Hy.AyU|L
ho8`sh>N
} l^GP3S
k.<]4iS
} $`ZzvZ'r
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SortUtil： zgx&Pte
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package org.rut.util.algorithm; K<?nq0-
o#) {1<0vg
import org.rut.util.algorithm.support.BubbleSort; }En
import org.rut.util.algorithm.support.HeapSort; !+>v[(OzM
import org.rut.util.algorithm.support.ImprovedMergeSort; T|J9cgtS
import org.rut.util.algorithm.support.ImprovedQuickSort; L86n}+ P\
import org.rut.util.algorithm.support.InsertSort; E)Gw0]G
import org.rut.util.algorithm.support.MergeSort; 2M#M"LHo
import org.rut.util.algorithm.support.QuickSort; Q!- 0xlx
import org.rut.util.algorithm.support.SelectionSort; P-F)%T[
import org.rut.util.algorithm.support.ShellSort; W} WI; cI
A.<H>=Z#O
/** .2d9?p3Y
* @author treeroot We0.3aG
* @since 2006-2-2 r/pH_@
* @version 1.0 Xq'cA9v=$J
*/ f}g\D#`]/
public class SortUtil { R_M?dEtE>
public final static int INSERT = 1; b0iSn#$
public final static int BUBBLE = 2; S$KFf=0
public final static int SELECTION = 3; kEwaT$
public final static int SHELL = 4; f#+el y
public final static int QUICK = 5; 3bO(?l`3h
public final static int IMPROVED_QUICK = 6; BA\/YW @
public final static int MERGE = 7; u]}s)SmDk
public final static int IMPROVED_MERGE = 8; l/;X?g5+
public final static int HEAP = 9; B8E'ddUw
(c0A.L)
public static void sort(int[] data) { ;iDPn2?6?x
sort(data, IMPROVED_QUICK); :#dE:L;T
} 2,ECYie^
private static String[] name={ \RNg|G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /Mb"V5S(W
}; %%(R@kh9
G\|,5HED
private static Sort[] impl=new Sort[]{ s4&^D<
new InsertSort(), zD?oXs
new BubbleSort(), ~y=T5wt
new SelectionSort(), Kw#so; e
new ShellSort(), UK9@oCIB
new QuickSort(), \fr-<5w79
new ImprovedQuickSort(), ^C2\`jLMY
new MergeSort(), gV&z2S~"
new ImprovedMergeSort(), +`?Y?L^ J
new HeapSort() Y*mbjyt[?X
}; pr%nbl
hiNEJ_f
public static String toString(int algorithm){ LC1(Xbf
return name[algorithm-1]; 7 |DHplI
} gZ5[ C
=zwOq(Bh W
public static void sort(int[] data, int algorithm) { ~]ZpA-*@Ut
impl[algorithm-1].sort(data); N !TW!
} (O0Urm
R|i/lEq
public static interface Sort { H'Yh2a`!o
public void sort(int[] data); i2~
} V5}B:SUB
s-dLZ.9F
public static void swap(int[] data, int i, int j) { B"%{i-v>**
int temp = data; @?h/B=56
data = data[j]; 6uKTGc4
data[j] = temp; &89oO@5
} 2NB L}x
} i<pk6rO1