[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; 5e!YYt>
} @ljvTgZ(X
int i1=l; %ZNp
int i2=mid+1; -1tdyCez
for(int cur=l;cur<=r;cur++){ OD,"8JF
if(i1==mid+1) |!r.p_Zt
data[cur]=temp[i2++]; N=qe*Rlf
else if(i2>r) vYh_<Rp5
data[cur]=temp[i1++]; NF& ++Vr6
else if(temp[i1] data[cur]=temp[i1++]; dcFqK~
else V}1D1.@
data[cur]=temp[i2++]; =F!DwaZ
} u3!aKXnv<
} ^y.e Fz
S.;>:Dd[K
} 9m2_zfO[w
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改进后的归并排序: yOn +Y
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package org.rut.util.algorithm.support; F{1;~Yg%
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import org.rut.util.algorithm.SortUtil; V\ud4
O[p;IG`
/** Evz;eobW/
* @author treeroot JHY0J &4s
* @since 2006-2-2 E$z)$`"1
* @version 1.0 0> pOP
*/ B,sv! p+q5
public class ImprovedMergeSort implements SortUtil.Sort { 5xZ*U
u$%>/cv
private static final int THRESHOLD = 10; ,`7;S,f
`aFy2x`3
/* <1(:W[M
* (non-Javadoc) j@c fR
* M@a?j<7P,m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zu<8%
*/ 1Aq*|JSk(
public void sort(int[] data) { stnyJ9
int[] temp=new int[data.length]; O*3x'I*a
mergeSort(data,temp,0,data.length-1); 20hF2V
} c5uT'P"
55vpnRM
private void mergeSort(int[] data, int[] temp, int l, int r) { O_*(:Z
int i, j, k; _VU/j9<+
int mid = (l + r) / 2; {~g(WxE
if (l == r) $9znRTFEj
return; G"CV S@
if ((mid - l) >= THRESHOLD) e^g3J/aU
mergeSort(data, temp, l, mid); X!5
else 0_HdjK
insertSort(data, l, mid - l + 1); dw)SF,
if ((r - mid) > THRESHOLD) p*10u@,
mergeSort(data, temp, mid + 1, r); GS|sx
else r3o_mO?X
insertSort(data, mid + 1, r - mid); M.K-)r,
Q)\7(n
for (i = l; i <= mid; i++) { `BKo`@
temp = data; @%L4^ms
} SWr?>dl
for (j = 1; j <= r - mid; j++) { ?PNG@OK
temp[r - j + 1] = data[j + mid]; -If-c'"G
} ZF :e6em
int a = temp[l]; "|CzQ&e
int b = temp[r]; ^5TSo&qZ
for (i = l, j = r, k = l; k <= r; k++) { hR3lo;'
if (a < b) { "J]_B
data[k] = temp[i++]; -|mWi
a = temp; ~\tI9L?|A
} else { .op: 2y9]
data[k] = temp[j--]; ~YHy'.
b = temp[j]; =whZ?,u1
} Y)Y`9u<?
} kVs'>H@FY
} <}b`2/wP
)/H=m7}1h
/** PL/as3O^A
* @param data 3vPb}
* @param l 9l2,:EQ*
* @param i M:|Z3p K
*/ ~<Z;)e
private void insertSort(int[] data, int start, int len) { gK/mm\K@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ][-N<
} Go3EWM`Cd8
} LZm6\x
} |du@iA]dP
} 5k.NZ
FX7=81**4
堆排序： T;jp2 #
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package org.rut.util.algorithm.support; ~H/|J^ J
j<>|Hi #`
import org.rut.util.algorithm.SortUtil; GHeJpS
Y3r m')c
/** :G9+-z{Y&
* @author treeroot $8o(_8Q)
* @since 2006-2-2 (&0%![j&
* @version 1.0 Z`nHpmNM
*/ g1VdP[Y#
public class HeapSort implements SortUtil.Sort{ r H;@N
xc[@lr
/* (non-Javadoc) ]&\HAmOQS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5bM/ v
*/ X=_pQ+j`^
public void sort(int[] data) { 4>nY't;0
MaxHeap h=new MaxHeap(); ,<F=\G_f
h.init(data); [hA%VF.9
for(int i=0;i h.remove(); KJ<7aZ
System.arraycopy(h.queue,1,data,0,data.length); jW*|Mu>2
} J]/TxUE
pC l[DE
private static class MaxHeap{ \#.,@g
$Z6g/bD`E
void init(int[] data){ tGnBx)J|
this.queue=new int[data.length+1]; >_P7k5Y^
for(int i=0;i queue[++size]=data; }#'wy
fixUp(size); ^I03PIy0l
} w2!G"oD
} OQMkpX-dH
)I'?]p<
private int size=0; z+I'N4*^
,gGIkl&
private int[] queue; /!;oO_U:#
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public int get() { RY'f%c
return queue[1]; ntbl0Sk
} uc!j`G*]
2^w3xL"
public void remove() { D+ mZ7&L
SortUtil.swap(queue,1,size--); x8k7y:
fixDown(1); uKc x$
} 6yk=4l\
file://fixdown ,Oa-AF/p
private void fixDown(int k) { bA}9He1
int j; MyB&mC7Es
while ((j = k << 1) <= size) { 0JzH dz
if (j < size %26amp;%26amp; queue[j] j++; #\s*>Z
if (queue[k]>queue[j]) file://不用交换 |{W4JFKJ
break; rD=8O#m g
SortUtil.swap(queue,j,k); }5c%v1
k = j; ~!UC:&UKo
} Z`x|\jI
} 68Po`_/s
private void fixUp(int k) { S:)Aj6>6
while (k > 1) { su;u_rc,
int j = k >> 1; & $E[l'
if (queue[j]>queue[k]) `roos<F1D
break; ~C[p}MED
SortUtil.swap(queue,j,k); ]<b$k
k = j; np2oXg%
} Fp'qn'){:#
} E;!pK9wL|
ql"&E{u?
} xz2U?)m;x
qLrvKoEX2
} m$<LO%<~p
+B(x:hzY9
SortUtil： ZK:dhwer
W0e+yIaR
package org.rut.util.algorithm; $VEG1]/svp
_|<kKfd?
import org.rut.util.algorithm.support.BubbleSort; l{b<rUh5W
import org.rut.util.algorithm.support.HeapSort; s18o,Zs'
import org.rut.util.algorithm.support.ImprovedMergeSort; lGrp^
import org.rut.util.algorithm.support.ImprovedQuickSort; @1+C*
import org.rut.util.algorithm.support.InsertSort; 8VG6~>ux'>
import org.rut.util.algorithm.support.MergeSort; ^n8ioL\*i
import org.rut.util.algorithm.support.QuickSort; AI KLJvte
import org.rut.util.algorithm.support.SelectionSort; 8Aq [@i
import org.rut.util.algorithm.support.ShellSort; 5)h#NkA\J
&L7u//
/** =5:L#` .
* @author treeroot z4t.-9(C
* @since 2006-2-2 7AwV4r*:
* @version 1.0 [5[}2B_t
*/ F`!B!uY
public class SortUtil { aq~>$CHa
public final static int INSERT = 1; /$NDH]a
public final static int BUBBLE = 2; t][U`1>i
public final static int SELECTION = 3; bVfFhfh*
public final static int SHELL = 4; e^v5ai
public final static int QUICK = 5; UN ;9h9
public final static int IMPROVED_QUICK = 6; &O|!w&
public final static int MERGE = 7; 2P\k;T(
public final static int IMPROVED_MERGE = 8; hxG=g6:G
public final static int HEAP = 9; V|6PKED
+'fy%/
public static void sort(int[] data) { wVegr
sort(data, IMPROVED_QUICK); &6]+a4
} '?| (QU:)F
private static String[] name={ ?:StFlie
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %v}SJEXFp
}; 0e./yPTT
'XW[uK]w)
private static Sort[] impl=new Sort[]{ >?Y)evW
new InsertSort(), 05sWN0
new BubbleSort(), Z_b^K^4
new SelectionSort(), 1D2Uomd(
new ShellSort(), $;O-1# ]
new QuickSort(), #h,7dz.d
new ImprovedQuickSort(), *"cK_MH/o
new MergeSort(), Q6>7{\8l
new ImprovedMergeSort(), )1CYs4lp
new HeapSort() )"( ojh
}; 8aDSRfv*
[tN^)c`s/
public static String toString(int algorithm){ 0*e)_l!
return name[algorithm-1]; Q1ox<-
} 7RXTQ9BS
~\vGwy
public static void sort(int[] data, int algorithm) { mM`zA%=
impl[algorithm-1].sort(data); jM<=>P
} /"~ D(bw0=
{;:QY1QT
public static interface Sort { )q.Z}_,)@
public void sort(int[] data); ^O>G?a
} Th!.=S{Y5
4)]w"z0Pc
public static void swap(int[] data, int i, int j) { mT]+wi&
int temp = data; 8]SJ=c"}Xf
data = data[j]; $? 'JePC
data[j] = temp; ^pI&f{q
} v?AQ&'Fk
} CMQlxX?