[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; yUo8-OaL7
} G93V=Bk=
int i1=l; YQHpW>z
int i2=mid+1; a5ZXrWv
for(int cur=l;cur<=r;cur++){ ?uL-qsU
if(i1==mid+1) H.;}%id
data[cur]=temp[i2++]; Q[NoFZ V!
else if(i2>r) ~>9G\/u j
data[cur]=temp[i1++]; bK0(c1*a[e
else if(temp[i1] data[cur]=temp[i1++]; jR[c3EA ;
else &a=rJvnIO&
data[cur]=temp[i2++]; 25vjn 1$sW
} (T pnJq
} w8Z#]kRv
"PRHQW
} 8M,o)oH
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改进后的归并排序: obF|;fwPnR
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package org.rut.util.algorithm.support; M_%KhK
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import org.rut.util.algorithm.SortUtil; H3R{+7
l]wLQqoO
/** `Rt w'Uz
* @author treeroot F4T!&E%6
* @since 2006-2-2 N]/cBGy
* @version 1.0 FqbGT(QB0
*/ srN7
public class ImprovedMergeSort implements SortUtil.Sort { 8g_kZ^<[
^8,prxaok
private static final int THRESHOLD = 10; %au>D
LFi* O&
/* ;DnUeE8
* (non-Javadoc) vI(LIfe;
* }2RbX,0l9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E+XS7':I
*/ &gS-.{w "
public void sort(int[] data) { N.z2eo
int[] temp=new int[data.length]; l"dXL"h
mergeSort(data,temp,0,data.length-1); mCg^Y)Q
} ,@;|+C
j~ds)dW%`&
private void mergeSort(int[] data, int[] temp, int l, int r) { GEVDXx>@
int i, j, k; 'do2n/
int mid = (l + r) / 2; r`Fs"n#^-4
if (l == r) z;9D[ME#1
return; o*7NyiJ@z
if ((mid - l) >= THRESHOLD) 6U8esPs,
mergeSort(data, temp, l, mid); sj/k';#g
else Jv3G\9_
insertSort(data, l, mid - l + 1); Gchs$^1`t
if ((r - mid) > THRESHOLD) ;Krs*3 s
mergeSort(data, temp, mid + 1, r); qP;1LAX
else RZ{O6~VH
insertSort(data, mid + 1, r - mid); Lks+FW
v07A3oj
for (i = l; i <= mid; i++) { %2I>-0]B
temp = data; af@a /
} p>?(uGV
for (j = 1; j <= r - mid; j++) { JK!`uG+v
temp[r - j + 1] = data[j + mid]; J?Y,3cc.
} fP4P'eI
int a = temp[l]; `.~S/$a.&
int b = temp[r]; P(@Q[XQ2
for (i = l, j = r, k = l; k <= r; k++) { N& F.hi$_
if (a < b) { \ Qx%76
data[k] = temp[i++]; {#?|&n<
a = temp; aizws[C
} else { %?+Lkj&
data[k] = temp[j--]; !a\v)R
b = temp[j]; (c}!gjm
} yLCMu | +
} X0j>g^b8
} W(ryL_#;
,jz~Np_2
/** ~V?z!3r-)
* @param data ]CcRI|g}
* @param l _\k?uUo&,^
* @param i ;! ?l8R
*/ 85dC6wI4K
private void insertSort(int[] data, int start, int len) { Q -$) H;,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^.@%n1I"5y
} MRo_An+
} j`@`M*)GB
} q!U$\Q&
} .UX4p =
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堆排序： GL9'dL|
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package org.rut.util.algorithm.support; lcpiCZ
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import org.rut.util.algorithm.SortUtil; gx^!&>eIb#
w]h8KNt
/** &J9 + 5L8
* @author treeroot 32aI0CT
* @since 2006-2-2 Xe:^<$z
* @version 1.0 !9r%d8!z
*/ abS~'r14
public class HeapSort implements SortUtil.Sort{ q6E'W" Q
,:K{
/* (non-Javadoc) :'q$emtY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SFwY%2np)!
*/ 0'A"]6
public void sort(int[] data) { |[#Qk 4Ttf
MaxHeap h=new MaxHeap(); %o\+R0K
h.init(data); [+A]E,pv]1
for(int i=0;i h.remove(); 9vDOSwU*
System.arraycopy(h.queue,1,data,0,data.length); m0.g}N-w
} }zkFl{/u
`mD!z.`U
private static class MaxHeap{ :F[s
J_yXL7d
void init(int[] data){ `w4'DB-R)
this.queue=new int[data.length+1]; U8>4ClJ4
for(int i=0;i queue[++size]=data; K9}Brhe
fixUp(size); vAop#V
} AH'3 5Kf)
} 0x*|X@6\
o>+mw|{
private int size=0; FY)]yz
3]}RjOTU
private int[] queue; M?('VOy)
.C+(E@eyA
public int get() { P =Q+VIP&
return queue[1]; 4DL2 A;T
} /|&4&$
>tMI%r
public void remove() { <9xr?i=
SortUtil.swap(queue,1,size--); {!?M!/d
fixDown(1); dSTyx#o
} ~9k E.
file://fixdown ^ ~1QA
private void fixDown(int k) { |XNw&X1VF
int j; ui`EODhA(
while ((j = k << 1) <= size) { "D4% A!i
if (j < size %26amp;%26amp; queue[j] j++; (s|WmSQ
if (queue[k]>queue[j]) file://不用交换 oy[ px9Wx
break; 16@<G
SortUtil.swap(queue,j,k); F+BCzsm7$
k = j; GZx*A S]+
} :YkAp9civ
} {=&({ cS
private void fixUp(int k) { uxKO"
while (k > 1) { Z'5&N5hx
int j = k >> 1; s7:_!Nd@8
if (queue[j]>queue[k]) vy={ziJ
break; "u$XEA
SortUtil.swap(queue,j,k); /D|q-`*K
k = j; s]A8C^;c
} ;[P>
} 5f0g7w =-
#M#$2Vt
} x)$0Nr62D
:p)^+AF"5
} M5:*aCN6P
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SortUtil： T?Z^2.Pvc
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package org.rut.util.algorithm; j}tGcFwvSN
hc0$mit
import org.rut.util.algorithm.support.BubbleSort; #E\6:UnT
import org.rut.util.algorithm.support.HeapSort; %8Y+Df;ax
import org.rut.util.algorithm.support.ImprovedMergeSort; 5{DwD{Q
import org.rut.util.algorithm.support.ImprovedQuickSort; -U_,RMw~
import org.rut.util.algorithm.support.InsertSort; ~g#/q~UE
import org.rut.util.algorithm.support.MergeSort; suWO:]FR
import org.rut.util.algorithm.support.QuickSort; fY78
import org.rut.util.algorithm.support.SelectionSort; <:nyRy}
import org.rut.util.algorithm.support.ShellSort; HFyQ$pbBU
!OPHS^L
/** %yfl-c(u
* @author treeroot .qYQ3G'V
* @since 2006-2-2 !:esdJH
* @version 1.0 L0=`1q
*/ LLzxCMc9*
public class SortUtil { UpSJ%%.n
public final static int INSERT = 1; !5[SNr3^
public final static int BUBBLE = 2; *M#L)c;6
public final static int SELECTION = 3; 6;!)^b
public final static int SHELL = 4; #s>'IPc0
public final static int QUICK = 5; o.zP1n|G~r
public final static int IMPROVED_QUICK = 6; 4!96k~d}
public final static int MERGE = 7; [,ulz4"
public final static int IMPROVED_MERGE = 8; ;+o6"ky5
public final static int HEAP = 9; /<+`4n
cAVdH{$"
public static void sort(int[] data) { lMg#zT!?
sort(data, IMPROVED_QUICK); $txF|Fj]^A
} uz$p'Q
private static String[] name={ ^k^?>h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~h=iZ/g_^_
}; DC BN89#
'q}f3u>
private static Sort[] impl=new Sort[]{ vE#8&Zq
new InsertSort(), XUUP#<,s
new BubbleSort(), BjTgZ98J
new SelectionSort(), 8~RJnwF^
new ShellSort(), H*f2fyC1\
new QuickSort(), /e|qyWs
new ImprovedQuickSort(), 4 540Lw'A
new MergeSort(), ${wp}<u_
new ImprovedMergeSort(), =_@) KWeX$
new HeapSort() ug;\`.nT^
}; ){eQ.yW
L=HnVgBs
public static String toString(int algorithm){ x`IWo:j
return name[algorithm-1]; 5~2_wWjX
} g$hEVT
mtE+}b@(!&
public static void sort(int[] data, int algorithm) { yFd942
impl[algorithm-1].sort(data); vLq%k+D#
} SlT>S1`rnG
Wy-y-wi:p
public static interface Sort { ;<b7kepR
public void sort(int[] data); C#)T$wl[E
} ~MYE8xrId
o"A)t=
public static void swap(int[] data, int i, int j) { Q^05n$ tI
int temp = data; BYa#<jXtAT
data = data[j]; a+~b3
data[j] = temp; $o$WFV+h
} /<k5"C%z
} %Kp^wf#o9