[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; 1zjaR4Tf
} KFDS q"j
int i1=l; g_w&"=.jBq
int i2=mid+1; i-W
for(int cur=l;cur<=r;cur++){ EvE,Dm?h
if(i1==mid+1) =Ikg.jYq&F
data[cur]=temp[i2++]; \cQ .|S
else if(i2>r) g{>^`JtP
data[cur]=temp[i1++]; K=6UK%y A
else if(temp[i1] data[cur]=temp[i1++]; 3]U]?h
else sG,+
data[cur]=temp[i2++]; >qR~'$,$
} #U=;T]!'$
} }"zC >eX&
'<@=vGsye
} 8g*hvPc
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改进后的归并排序: }nud
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package org.rut.util.algorithm.support; d~*TIN8Ke~
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import org.rut.util.algorithm.SortUtil; 6)e5zKW!?
Ct]A%=cZW
/** 0JY WrPR
* @author treeroot 4nkE IZ
* @since 2006-2-2 &uM^0eM
* @version 1.0 I^3:YVR&
*/ :0^s0l
public class ImprovedMergeSort implements SortUtil.Sort { (/h5zCc/v
?Zz'|.l@
private static final int THRESHOLD = 10; v6uxxsI>Hm
C!%:o/
/* Qw)9r{f
* (non-Javadoc) 8#LJ*o
* Zk? =
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i0pU!`0
*/ wW`}VKu
public void sort(int[] data) { .q;ED`G
int[] temp=new int[data.length]; Q\kub_I{@
mergeSort(data,temp,0,data.length-1); ]hTb@.
} YaY8 `M{
UUtbD&\
private void mergeSort(int[] data, int[] temp, int l, int r) { IFuZ]CBz
int i, j, k; u oVNK
int mid = (l + r) / 2; Hs0pW5oZ
if (l == r) r;qzo.
return; tRfm+hqRZ
if ((mid - l) >= THRESHOLD) ;D2E_!N dt
mergeSort(data, temp, l, mid); !3}deY8;#
else j"7 JLe*
insertSort(data, l, mid - l + 1); smU4jh9S
if ((r - mid) > THRESHOLD) RiFw?Q+
mergeSort(data, temp, mid + 1, r); >+9JD%]x]
else 8i0
insertSort(data, mid + 1, r - mid); h##WA=1QZ
[}o~PN:sT(
for (i = l; i <= mid; i++) { z,f=}t[.Y
temp = data; uV]ULm#,i
} %3=J*wj>D
for (j = 1; j <= r - mid; j++) { SUdm 0y
temp[r - j + 1] = data[j + mid]; <$E6oZ
} TKI$hc3|L
int a = temp[l]; U;^[$Aq
int b = temp[r]; )]Ti>RO7
for (i = l, j = r, k = l; k <= r; k++) { d*]Ew=^L
if (a < b) { mLwY]2T"
data[k] = temp[i++]; OtUrGQP
a = temp; %|"Qi]c d
} else { sH!O0WL
data[k] = temp[j--]; hR)2xz
b = temp[j]; | {P|.
} zV.pol
} 1]OSWCEm*[
} )pgrl
tIZ~^*'
/** %w"nDu2Gcv
* @param data F9Z@x)
* @param l e>H:/24
* @param i kDsIp=
*/ ;!u;!F!i
private void insertSort(int[] data, int start, int len) { |!*Xl) ]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mh`|=M]8E
} hU {-a`
} =,/D/v$m'2
} =nxKttmU0
} vv5i? F
#G;X' BN
堆排序： Ill[]O
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package org.rut.util.algorithm.support; ]> G&jd7
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import org.rut.util.algorithm.SortUtil; b-<HXn_Fd
PpOlt.yui
/** t&RruwN_;
* @author treeroot )|]dmQ-
* @since 2006-2-2 (4+1lOd
* @version 1.0 +!O-kd
*/ YD_]!HK}
public class HeapSort implements SortUtil.Sort{ y\PxR708
b:MG@Hxc
/* (non-Javadoc) ^%[F8\}XPJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o$J6 ~dn
*/ wGLF%;rRe4
public void sort(int[] data) { q)I|2~Q c^
MaxHeap h=new MaxHeap(); ?d-70pm
h.init(data); U}AX0*S
for(int i=0;i h.remove(); NPJ.+ph
System.arraycopy(h.queue,1,data,0,data.length); A WJWtUa
} U[8{_h<#
'"xiS$b(
private static class MaxHeap{ ;VzMU ;j
b1^cD6sT+
void init(int[] data){ `deYi2z
this.queue=new int[data.length+1]; Y1\K;;X
for(int i=0;i queue[++size]=data; w~@[r4W
fixUp(size); 32>x^>G=>
} A,XfD}+:Z
} =*MR(b>
\ P/W8{
private int size=0; [)|+F wJ
]Yz'8uts
private int[] queue; ]+%=@mWYs
uHvaZMu
public int get() { ExrY>*v
return queue[1]; MOHHZApt
} pj|X]4?wdI
@ss):FwA
public void remove() { uqZ3Hyb
SortUtil.swap(queue,1,size--); a$}6:E
fixDown(1); V SAafux
} buYDl
file://fixdown u,9q<&,
private void fixDown(int k) { v33T @
int j; dR[o|r
while ((j = k << 1) <= size) { 7),*3c')
if (j < size %26amp;%26amp; queue[j] j++; 8S>>7z!U
if (queue[k]>queue[j]) file://不用交换 U[fSQ`&D
break; r8v:|Q1"
SortUtil.swap(queue,j,k); 0wvU?z%WK
k = j; VGJDqm!
} +by|
} h48 bb.p2
private void fixUp(int k) { a4by^
while (k > 1) { Qj!d^8
int j = k >> 1; 9dYOH)f
if (queue[j]>queue[k]) `|,tCM&-
break; fsI`DjKi)
SortUtil.swap(queue,j,k); @:gl:mc
k = j; /v$]X4 S`
} (xUFl@I!
} i'HST|!j
7}07Pit
} cYD1~JX.
0UjyMEiK
} }AAbhr9d}
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SortUtil： q]l\`/R%u
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package org.rut.util.algorithm; ?>TbTfmR
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import org.rut.util.algorithm.support.BubbleSort; ee\Gl?VN
import org.rut.util.algorithm.support.HeapSort; >I:9'"`
import org.rut.util.algorithm.support.ImprovedMergeSort; ~ i'C/[P
import org.rut.util.algorithm.support.ImprovedQuickSort; LOt#1Qv
import org.rut.util.algorithm.support.InsertSort; .m'N7`VB
import org.rut.util.algorithm.support.MergeSort; _<Vg[-:1
import org.rut.util.algorithm.support.QuickSort; %\_h7:
import org.rut.util.algorithm.support.SelectionSort; FJlsWh4,6=
import org.rut.util.algorithm.support.ShellSort; c0hdLl;5
10TSc j
/** >oB ?
* @author treeroot ugRV5bUk
* @since 2006-2-2 ]Y$&78u8t
* @version 1.0 IjgBa-o/V
*/ A1 b6Zt
public class SortUtil { qG*_w RF
public final static int INSERT = 1; .Btv}b
public final static int BUBBLE = 2; B~e7w 4
public final static int SELECTION = 3; uRs9}dzv
public final static int SHELL = 4; k0=|10bi
public final static int QUICK = 5; >sB=\
public final static int IMPROVED_QUICK = 6; 0-lPhnrp
public final static int MERGE = 7; =b|)Wnt2f
public final static int IMPROVED_MERGE = 8; <vO8_2,V-
public final static int HEAP = 9; b^;N>zx
O]4W|WI3
public static void sort(int[] data) { Ho:}Bn g
sort(data, IMPROVED_QUICK); $o{F
} :v''"+\
private static String[] name={ aB7d(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +}`p"<'u
}; |UABar b
aJ% e'F[
private static Sort[] impl=new Sort[]{ `W D*Q-&n
new InsertSort(), -aTg>Q|g&
new BubbleSort(), {Nzmb|&
new SelectionSort(), (4E.Li<O
new ShellSort(), }u38:(^`ai
new QuickSort(), <7@mg/T
new ImprovedQuickSort(), q^Q|.&_k /
new MergeSort(), tP/GDC;
new ImprovedMergeSort(), qT&S
new HeapSort() qYQUr8{
}; ~Q3WBOjn
,dGFX]P
public static String toString(int algorithm){ |% la
return name[algorithm-1]; rin >r0o
} rHA/
H@ 1[SKBl
public static void sort(int[] data, int algorithm) { 'Y,+D`&i)
impl[algorithm-1].sort(data); 9}? 5p]%
} \H"/2o%l")
l{B<"+8
public static interface Sort { Q#d+IIR0gK
public void sort(int[] data); 3D[:Rf[
} N9fUlXhR
q[Sp|C6x
public static void swap(int[] data, int i, int j) { Y2ah zB
int temp = data; ^D>/wX\u
data = data[j]; XPR:_
data[j] = temp; z22|Kv;w
} -wG[>Y
} Wb*T