[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; *=}$@OS
} MO)N0{.b
int i1=l; -Zfzl`r
int i2=mid+1; DV +DJcF
for(int cur=l;cur<=r;cur++){ vvw6 GB,M
if(i1==mid+1) h$|K vS
data[cur]=temp[i2++]; gsufd{{
else if(i2>r) ~]?Q'ER
data[cur]=temp[i1++]; M=n!tVlCV
else if(temp[i1] data[cur]=temp[i1++]; X tZ0z?
else Md'd=Y_0
data[cur]=temp[i2++]; P7d" E
} m *8[I
} l){l*~5zl2
" M8j?
} 1g{`1[.QO
;hNnF&l
改进后的归并排序: %YefTk8cr,
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package org.rut.util.algorithm.support; nU%rSASu
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import org.rut.util.algorithm.SortUtil; 4%2QF F@
hu[=9#''$
/** wG2lCv`d
* @author treeroot Y>Q9?>}Q
* @since 2006-2-2 ]OZZPo
* @version 1.0 HH+NNSRO
*/ #B:J7&@fn
public class ImprovedMergeSort implements SortUtil.Sort { F6Zl#eL
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private static final int THRESHOLD = 10; ya{vR* '~
LlL\7?_;
/* g*\u8fpRq
* (non-Javadoc) p#'BV'0bl
* ]"q[hF*PM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;Avd$&::
*/ )ruC_)
public void sort(int[] data) { N:[m,U9a
int[] temp=new int[data.length]; ^"K
mergeSort(data,temp,0,data.length-1); u*{hXR-"
} Y'Sxehx
A{\7HV5
private void mergeSort(int[] data, int[] temp, int l, int r) { ,%mTKOs
int i, j, k; "R+ x
int mid = (l + r) / 2; -N^}1^gA
if (l == r) ]ms#*IZ
return; i;*c|ma1>
if ((mid - l) >= THRESHOLD) |M`B
mergeSort(data, temp, l, mid); n'73DApW
else !(F+~,
insertSort(data, l, mid - l + 1); &D[dDUdHs
if ((r - mid) > THRESHOLD) !V$nU8p|
mergeSort(data, temp, mid + 1, r); vTQQd@
else SG |!wH^
insertSort(data, mid + 1, r - mid); ~ygiKsD6b
9z\q_0&i
for (i = l; i <= mid; i++) { *pw:oTO
temp = data; 7'7bIaJk
} mLPQ5`_
for (j = 1; j <= r - mid; j++) { tz j]c
temp[r - j + 1] = data[j + mid]; 71 hv~Nk/x
} 9 }|Bs=q
int a = temp[l]; ~^$ONmI5
int b = temp[r]; MA.1t
for (i = l, j = r, k = l; k <= r; k++) { F0o7XUt
if (a < b) { LTS3[=AB
data[k] = temp[i++]; !sEI|47{
a = temp; bPC {4l
} else { BRG1/f d
data[k] = temp[j--]; P9:7_Vc
b = temp[j]; I?J$";A
} wWY6DQQB
} D(Zux8l
} :RzcK>Gub=
J*U,kyYF
/** "'94E,W
* @param data (3 8.s:-
* @param l SEr\ u#
* @param i kWjCSC>jA
*/ Ko\m8\3?fK
private void insertSort(int[] data, int start, int len) { [X#bDO<t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $n(?oyf
} J;+tQ8,AP
} (03m%\
} 8UwL%"?YB
} 9Vxsv*OR,
"}*P9-%
堆排序： =y,_FFoS
3*CF!Y%
package org.rut.util.algorithm.support; #E5Sc\,
aN).G1
import org.rut.util.algorithm.SortUtil; W!4GL>9m}A
']u w,b
/** j8M}*1
* @author treeroot Os*,@N3t
* @since 2006-2-2 W>wIcUP<<
* @version 1.0 }=^YLu=
*/ ?%{bMqYJD{
public class HeapSort implements SortUtil.Sort{ *1ekw#'
mdypZ1f_
/* (non-Javadoc) x/~V ZO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,'= Y
*/ {}D8Y_=9\
public void sort(int[] data) { NVS U)#
MaxHeap h=new MaxHeap(); (jPN+yQ
h.init(data); "@ Zy+zLU
for(int i=0;i h.remove(); 0jrcXN~
System.arraycopy(h.queue,1,data,0,data.length); +VdYT6{p
} 1e'-rm F
ym2\o_^(
private static class MaxHeap{ $T^O38$
Fr,>|
void init(int[] data){ 2xni! *T+
this.queue=new int[data.length+1]; `;(/Wh
for(int i=0;i queue[++size]=data; Um9!<G=;
fixUp(size); y{? 6U>_
} uCNQ.Nbf C
} r@e_cD] M
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private int size=0; \hc}xy 0
BpDf4)|
private int[] queue; 67}y/C]<
?)",}XL6
public int get() { jzI\Q{[m'
return queue[1]; NqkRR$O
} JXftQOn
_t:rWC"X
public void remove() { QP7EPaW
SortUtil.swap(queue,1,size--); H6/@loO!Xy
fixDown(1); (vz)GrH>
} UrH^T;#
file://fixdown Z&s+*&TM
private void fixDown(int k) { n1y#gC
int j; NX@TWBn%
while ((j = k << 1) <= size) { I =qd\
if (j < size %26amp;%26amp; queue[j] j++; n4>
if (queue[k]>queue[j]) file://不用交换 _S,2j_R9
break; \r324Bw>2
SortUtil.swap(queue,j,k); 8$v17 3
k = j; 3yr{B Xn
} I?4J69'
} q_OIzZ@
private void fixUp(int k) { me1ac\
while (k > 1) { ? RB~%^c!
int j = k >> 1; #ZCgpg$wM
if (queue[j]>queue[k]) #MHnJ
break; #bsRL8@
SortUtil.swap(queue,j,k); Q7"KgqpQ3
k = j; >]T(}S~
} oxPOfI1%]
} 1 YMaUyL 1
X[j4V<4O
} '[qG ,^f
]'~'V2Ey
} ^zsCF0
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SortUtil： H",yVD
^yy\CtG
package org.rut.util.algorithm; W$:;MY>0f
P%'bSx1
import org.rut.util.algorithm.support.BubbleSort; ^w8H=UkP!+
import org.rut.util.algorithm.support.HeapSort; eJ'2CM6
import org.rut.util.algorithm.support.ImprovedMergeSort; ,EcmMI^A
import org.rut.util.algorithm.support.ImprovedQuickSort; [ueT]%
import org.rut.util.algorithm.support.InsertSort; r.-NfK4
import org.rut.util.algorithm.support.MergeSort; $'L(}gNv5
import org.rut.util.algorithm.support.QuickSort; 3c@Cb`w@
import org.rut.util.algorithm.support.SelectionSort; }`5%2iG
import org.rut.util.algorithm.support.ShellSort; X]C-y,r[M
Y&Pi`E9=
/** 9S=9m[#y'
* @author treeroot ^5=}Y>EJO
* @since 2006-2-2 hrU.QF8
* @version 1.0 $o/?R]h
*/ pA(@gisg
public class SortUtil { n$5,B*
public final static int INSERT = 1; +Y)rv6}m
public final static int BUBBLE = 2; g@MTKqs
public final static int SELECTION = 3; u6t.$a!5
public final static int SHELL = 4; >I]t|RT])
public final static int QUICK = 5; ThJLaNS
public final static int IMPROVED_QUICK = 6; Nf-IDK
public final static int MERGE = 7; )w;XicT
public final static int IMPROVED_MERGE = 8; ^B?{X|U37
public final static int HEAP = 9; cQ*:U@
j\@s pbE@
public static void sort(int[] data) { l:j9lBS
sort(data, IMPROVED_QUICK); 7S2Bm]fP
} "F"G(ba^
private static String[] name={ PovPO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `hM]5;0
}; h!yF
dfc-#I p?
private static Sort[] impl=new Sort[]{ +r4US or
new InsertSort(), ;#`Z(A}
new BubbleSort(), f+fF5Z\
new SelectionSort(), 1swh7
new ShellSort(), %J~8a_vO
new QuickSort(), Yfxc$ub
new ImprovedQuickSort(), J>!p^|S{
new MergeSort(), `j_R ?mY
new ImprovedMergeSort(), [A*vl9=
new HeapSort() YCw^u
}; L!mQP
*7BY$q
public static String toString(int algorithm){ +;FF0_
return name[algorithm-1]; 3~s0ux[
} <mrLld#_:C
+vDT^|2SF
public static void sort(int[] data, int algorithm) { )ckx&e
impl[algorithm-1].sort(data); ^row=5]E
} W%0-SR
3w!oJB
public static interface Sort { a^4(7
public void sort(int[] data); wnt^WW=a[
} ;bP7|
-}4H'%Z(i
public static void swap(int[] data, int i, int j) { f=}u;^
int temp = data; 0S/&^
data = data[j]; *Vv ;NA/
data[j] = temp; )bPNL$O
} R;I}#b cJ
} Qbt fKn95