[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; )S5Q5"j&=f
} U2h?l `nP
int i1=l; 2yN~[,L
int i2=mid+1; 68D.Li
for(int cur=l;cur<=r;cur++){ /1^%32c
if(i1==mid+1) [k.<x'#
data[cur]=temp[i2++]; v3[ 2!UXq
else if(i2>r) Aw5yvQ>]e
data[cur]=temp[i1++]; [bZXzV(
else if(temp[i1] data[cur]=temp[i1++]; UrtN3icph
else S4\T (
data[cur]=temp[i2++]; hxv/285B
} u=4tW:W,
} ge E7<"m%
'91Ak,cWB
} !]"T`^5,Y
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改进后的归并排序: eQNYfWR
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package org.rut.util.algorithm.support; %II |;<
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import org.rut.util.algorithm.SortUtil; JU~l
F&uU ,);
/** Va{`es)hky
* @author treeroot _kar5B$
* @since 2006-2-2 PB`94W
* @version 1.0 6.k2,C4dT<
*/ f-3lJ?6
public class ImprovedMergeSort implements SortUtil.Sort { T%:}/@
YUc&X^O
private static final int THRESHOLD = 10; 76hi@7a
J0{0B=d;
/* Er%nSH^"
* (non-Javadoc) 0uj3kr?cv
* k<AnTboa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WyO10yvR
*/ M,7v}[Tbl
public void sort(int[] data) { v_b%2;<1
int[] temp=new int[data.length]; B>JRta;hj
mergeSort(data,temp,0,data.length-1); iptzVr#b[
} X)'uTf0
i5rAb<q`
private void mergeSort(int[] data, int[] temp, int l, int r) { b2ZKhS8
int i, j, k; zHyM@*Gf(
int mid = (l + r) / 2; [t>}M6?R:
if (l == r) 4Sw)IU~K(
return; .)Du ;
if ((mid - l) >= THRESHOLD) &'i>5Y
mergeSort(data, temp, l, mid); 6)Kg!.n%f
else _57i[U r
insertSort(data, l, mid - l + 1); 38rC; 6
if ((r - mid) > THRESHOLD) ?*Jv&f#
mergeSort(data, temp, mid + 1, r); &,bJ]J)8O
else !x&/M*nBE
insertSort(data, mid + 1, r - mid); [X;yJ$
%\CsP!
for (i = l; i <= mid; i++) { P0|V1,)
temp = data; c!j$-Ovm
} hX<0{pXM4
for (j = 1; j <= r - mid; j++) { S\mh{#Lpk
temp[r - j + 1] = data[j + mid]; \|Us/_h
} CGPPo;RjK
int a = temp[l]; RtN5\
int b = temp[r]; ^ @sg{_.~l
for (i = l, j = r, k = l; k <= r; k++) { =%p0rz|b
if (a < b) { s:6H^DQ"C
data[k] = temp[i++]; )88z=5.
a = temp; 3g)pLW
} else { 7mt;qn?n
data[k] = temp[j--]; 6 fL=2a
b = temp[j]; PjDYdT[
} 4OC^IS
} jsjH.O
} L_Ff*
e![n$/E3R
/** +H8]5~',L%
* @param data TU^UR}=lP
* @param l eqg|bc[i!t
* @param i 'tklz*
*/ `gx_+m^
private void insertSort(int[] data, int start, int len) { HW)> `
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pFx7URZA
} 5v6*.e'p
} ]haZT\
} %?^IS&]Z
} X`ee}C.D_
Jzo|$W
堆排序： :!n_a*.{
B!4chxzUZ
package org.rut.util.algorithm.support; 9aHV~5
gQ6_]~4
import org.rut.util.algorithm.SortUtil; ]oUvC
r".*l?=
/** z;J"3kM
* @author treeroot <Y9%oJn%
* @since 2006-2-2 A_i=hj2f
* @version 1.0 9rf6,hF
*/ 'H0uvvhOp
public class HeapSort implements SortUtil.Sort{ il|e5TD^
)w4i0Xw^C:
/* (non-Javadoc) ~+ Mp+gE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -XRn%4EX?
*/ \QGh@AQp"
public void sort(int[] data) { Y{ijSOl3
MaxHeap h=new MaxHeap(); 49W@?:b
h.init(data); yb\T<*
for(int i=0;i h.remove(); sIJl9
System.arraycopy(h.queue,1,data,0,data.length); dG2k4 O
} 2<q>]G-nN
=^\yE"a
private static class MaxHeap{ m&a.i B
W US[hx,
void init(int[] data){ H|JPqBNRh
this.queue=new int[data.length+1]; d|;S4m`
for(int i=0;i queue[++size]=data; g0O~5.f
fixUp(size); {<+B>6^
} 0n<>X&X
} E^qJ5pr_P
_3~/Z{z8
private int size=0; W|'7)ph
?71?Vd
private int[] queue; ^hiIMqY_{`
b~>kTO
public int get() { <NKmLAfX
return queue[1]; D`d*bNR
} A#k(0e!O
zZp0g^;.?
public void remove() { Di)%vU
SortUtil.swap(queue,1,size--); 3b{ 7Z 2
fixDown(1); wz`\RHL
} amvD5
file://fixdown oN({X/P2j
private void fixDown(int k) { sE:~+C6o:
int j; QP>tu1B|
while ((j = k << 1) <= size) { *hWpJEV
if (j < size %26amp;%26amp; queue[j] j++; \no6]xN;
if (queue[k]>queue[j]) file://不用交换 RGg=dN
break; x$hhH=
SortUtil.swap(queue,j,k); Bm"-X:='
k = j; SbLm
} n#$sLXVy
} 5ir Ffr
private void fixUp(int k) { OEiu,Y|@l
while (k > 1) { >f$NG
int j = k >> 1; #K#BNpG|
if (queue[j]>queue[k]) /|s~X@%K
break; 27J!oin$
SortUtil.swap(queue,j,k); ;z2\ Q$
k = j; ?qC6p|H
} vbBNXy/
} ahICx{hK
^#( B4l!
} L!;"73,&(8
r+:]lO
} C GN=kQ
f |%II,!3
SortUtil： $|"Y|3&X
c!0u,6
package org.rut.util.algorithm; Ms=5*_J2Jk
u}r>?/V!
import org.rut.util.algorithm.support.BubbleSort; 6C'W
import org.rut.util.algorithm.support.HeapSort; U_Jchi,!
import org.rut.util.algorithm.support.ImprovedMergeSort; Sy@)Q[A
import org.rut.util.algorithm.support.ImprovedQuickSort; Jn7T5$pJ
import org.rut.util.algorithm.support.InsertSort; #B2a?
import org.rut.util.algorithm.support.MergeSort; r{>`"
import org.rut.util.algorithm.support.QuickSort; baQORU=X
import org.rut.util.algorithm.support.SelectionSort; /Fk]>|*
import org.rut.util.algorithm.support.ShellSort; O:E0htdWr
_"%hcCMw
/** d4~;!#<
* @author treeroot - f?8O6e
* @since 2006-2-2 XQ3"+M_KG
* @version 1.0 ]J1oY]2~
*/ yopC <k
public class SortUtil { =cR"_Z[8X
public final static int INSERT = 1; ej,)<*
public final static int BUBBLE = 2; &2,3R}B/
public final static int SELECTION = 3; HVdy!J
public final static int SHELL = 4; CP'b,}Dd?I
public final static int QUICK = 5; 'kOkwGf!
public final static int IMPROVED_QUICK = 6; %1oB!+tv
public final static int MERGE = 7; u4#YZOiY)A
public final static int IMPROVED_MERGE = 8; hv0bs8h
public final static int HEAP = 9; dzQs7D}
HKL/D
public static void sort(int[] data) { efr9
sort(data, IMPROVED_QUICK); Rtu"#XcBw+
} n!-]f.=P
private static String[] name={ Q&#Arph0e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %}IrZrh
}; <Hf3AB;#4
G{.[o6>
private static Sort[] impl=new Sort[]{ Ct][B{
new InsertSort(), jj&mRF0gCb
new BubbleSort(), 2U|"]tpM&
new SelectionSort(), 3qW](
new ShellSort(), B[.$<$}G
new QuickSort(), skm~~JM^
new ImprovedQuickSort(), 38 ]}+Bb
new MergeSort(), ;Rlf[](iL
new ImprovedMergeSort(), Z;O!KsJ
new HeapSort() $Ge0<6/
}; pwH*&YU
J!Q #xs
public static String toString(int algorithm){ 9a2[_Wy
return name[algorithm-1]; XJ!?>)N .
} Oq^t[X'
Z9G4in8
public static void sort(int[] data, int algorithm) { G|oO
impl[algorithm-1].sort(data); G} f9:G
} O3V.4tp
ZO!h!2*
public static interface Sort { c/7}5#Rs
public void sort(int[] data); h`dHk]O
} Mkh/+f4
[_eT{v2B4
public static void swap(int[] data, int i, int j) { ppo.#p0w
int temp = data; %+htA0aX
data = data[j]; GorEHlvVh
data[j] = temp; ]=o1to-
} L+mE&
} 6FYL},.R