[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; `gSqwN<x%
} g;D [XBp
int i1=l; >a5CW~Z]
int i2=mid+1; BbnY9"
for(int cur=l;cur<=r;cur++){ ~;9B\fE`
if(i1==mid+1) <Pg4>
data[cur]=temp[i2++]; #'_i6
else if(i2>r) R=_ fk
data[cur]=temp[i1++]; R6ca;
else if(temp[i1] data[cur]=temp[i1++]; *&^`Uk,[
else $x)C_WZj?
data[cur]=temp[i2++]; P0Z1cN}
} [2WJ>2r}6
} mtOCk 5E
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} z%<Z#5_N
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改进后的归并排序: 2<y!3OeN
]KBzuz%
package org.rut.util.algorithm.support; (ylpH`
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import org.rut.util.algorithm.SortUtil; W4Tuc:X5
#"jEc*&=
/** ckHHD|
* @author treeroot h}nceH0s3d
* @since 2006-2-2 mhv{6v
* @version 1.0 2zZ" }Zr#
*/ @rB!47!
public class ImprovedMergeSort implements SortUtil.Sort { oQ{(7.e7)
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private static final int THRESHOLD = 10; [yF>W$Bn%
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/* `%SFu
* (non-Javadoc) {R5Q{]dK3
* wz}BH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xxLD8?@e7
*/ FFQ=<(Ki
public void sort(int[] data) { xPl+ rsU
int[] temp=new int[data.length]; =$`EB
mergeSort(data,temp,0,data.length-1); :<=A1>&8
} U ]Ek5p
8!(4;fN$j.
private void mergeSort(int[] data, int[] temp, int l, int r) { 9TuE.
int i, j, k; G|*^W;(Z
int mid = (l + r) / 2; RP?UKOc
if (l == r) {9S=:
return; 5ztHar~f
if ((mid - l) >= THRESHOLD) 'Y Bz?l9
mergeSort(data, temp, l, mid); |gxT-ZM
else Yw&{.<sL
insertSort(data, l, mid - l + 1); ,HO~NqmB4
if ((r - mid) > THRESHOLD) kC"lO'
mergeSort(data, temp, mid + 1, r); z%Pbs[*C
else |1iCt1~U
insertSort(data, mid + 1, r - mid); ?nZQTO7
i"V2=jTeBv
for (i = l; i <= mid; i++) { bL v_<\:m
temp = data; tXDO@YH3S
} T1sb6CT
for (j = 1; j <= r - mid; j++) { )4q0(O)d
temp[r - j + 1] = data[j + mid]; I CCmE#n
} E`]lr[
int a = temp[l]; KV v0bE
int b = temp[r]; >G(M&
for (i = l, j = r, k = l; k <= r; k++) { 2mg4*Ys
if (a < b) { U>PF#@ C/
data[k] = temp[i++]; vs]#?3+
a = temp; _1TSt%L
} else { sq1Z;l31"
data[k] = temp[j--]; a"ZBSg(
b = temp[j]; -L<''2t
} NZ`Mq
} XMzL\Edo
} Z\Qa6f!
ky*-THS
/** sz4)xJgF(
* @param data b~uz\%'3
* @param l f-!t31?XK
* @param i 7UM!<@9\
*/ WtlPgT;wE
private void insertSort(int[] data, int start, int len) { ;[9WB<t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l8rBp87Q
} K.'II9-{
} OT/*|Pn9
} 8JvF4'zx
} H~y 7o_tg
s"G;rcS}#
堆排序： l;_zXN
]"?+R+
package org.rut.util.algorithm.support; 2@ 4^ 81
lrQ +G@#
import org.rut.util.algorithm.SortUtil; PO9<g%qTf
c@iP^;D
/** ^,F8 ha
* @author treeroot AWSe!\b
* @since 2006-2-2 E{_$C!.
* @version 1.0 &aD]_+b
*/ svki=GD_(.
public class HeapSort implements SortUtil.Sort{ Ck<g0o6
MW&ww14
/* (non-Javadoc) O :P%gz4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E07g^y"}i
*/ #SWL$Vm>
public void sort(int[] data) { (KQAKEhD!
MaxHeap h=new MaxHeap(); wbg_%h:
h.init(data); ,jVj9m
for(int i=0;i h.remove(); cu&tdg^q
System.arraycopy(h.queue,1,data,0,data.length); --Dd'
} T 9lk&7W
V$e\84<
private static class MaxHeap{ :$eg{IXC"
haj\Dm
void init(int[] data){ G+Vlaa/7
this.queue=new int[data.length+1]; O%:EPdoU
for(int i=0;i queue[++size]=data; 1~X~"M
fixUp(size); )<W6cDx'H+
} F=}-ngx8&
} nU]4)t_o\
Zr!he$8(2
private int size=0; (W.euQy
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private int[] queue; dno=C
mMLxT3Ci8
public int get() { )./pS~
return queue[1]; &Uqm3z?v
} P\#z[TuHKC
){=2td$=$
public void remove() { ;-Bi~XD
SortUtil.swap(queue,1,size--); 9D 2B8t"a
fixDown(1); %\xwu(|kN
} !L5[s
file://fixdown ("HT0&#a
private void fixDown(int k) { )dFTH?Mpo
int j; iM'{,~8R5
while ((j = k << 1) <= size) { {UX[SAQ
if (j < size %26amp;%26amp; queue[j] j++; 3PS(1
if (queue[k]>queue[j]) file://不用交换 q r12"H
break; XsE] Z4
SortUtil.swap(queue,j,k); h9Zf4@w
k = j; ]A*v\Qy
} G4Y]fzC
} k:D;C3vJd
private void fixUp(int k) { q!l[^t|;
while (k > 1) { ==d@0`
int j = k >> 1; z;x1p)(xt
if (queue[j]>queue[k]) Yjo$^q
break; MguH)r`uT
SortUtil.swap(queue,j,k); +f)Nf)\q
k = j; rw*#ta O
} ;dq AmBG{8
} |BysSJ
cB5|%@$I
} iRwqt-WZ
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} U4hsbraz
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SortUtil： [&mYW.O<
J(&a,w>p
package org.rut.util.algorithm; kzs}U'U
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import org.rut.util.algorithm.support.BubbleSort; nLZT3`@~,
import org.rut.util.algorithm.support.HeapSort; =\IcUY,4
import org.rut.util.algorithm.support.ImprovedMergeSort; VU>s{_|{
import org.rut.util.algorithm.support.ImprovedQuickSort; 9HI9([Cs
import org.rut.util.algorithm.support.InsertSort; wA`A+Z2*?
import org.rut.util.algorithm.support.MergeSort; Dim,HPx]d
import org.rut.util.algorithm.support.QuickSort; "Q*Z?6[Z
import org.rut.util.algorithm.support.SelectionSort; hM*T{|y
import org.rut.util.algorithm.support.ShellSort; L@rKG~{Xy
aO@zeKg
/** 0-dhGh?.
* @author treeroot m .2)P~a
* @since 2006-2-2 G:qkk(6_#
* @version 1.0 maANxSzi
*/ !"E&Tk}
public class SortUtil { g+ `Ie'o<
public final static int INSERT = 1; Zxw>|eKI>D
public final static int BUBBLE = 2; _"`wUMee
public final static int SELECTION = 3; 54 8w v
public final static int SHELL = 4; HaeF`gI^Ee
public final static int QUICK = 5; 38P_wf~\
public final static int IMPROVED_QUICK = 6; p-U'5<n
public final static int MERGE = 7; Xg#g`m%(M
public final static int IMPROVED_MERGE = 8; ~mUP!f
public final static int HEAP = 9; |L{<=NNs:D
GXaCH))TO
public static void sort(int[] data) { U4*5o~!=S
sort(data, IMPROVED_QUICK); (tGK~!cAv
} cTRQI3Oa>
private static String[] name={ e=nExY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X~RET[L2
}; IXp P.d
L4SvE^2+
private static Sort[] impl=new Sort[]{ :SSlUl4sU$
new InsertSort(), ZiDmx-X
new BubbleSort(), fTM^:vkO
new SelectionSort(), LQYT/
new ShellSort(), }#@P+T:b
new QuickSort(), /Ny/%[cu
new ImprovedQuickSort(), >u5}5OP7
new MergeSort(), 6.tppAO+
new ImprovedMergeSort(), 6USet`#
new HeapSort() BzH7E[R49
}; F0Xv84:O
2l+O|R
public static String toString(int algorithm){ >*A\/Da]j
return name[algorithm-1]; La}=Ng
} N i^pP@('
?Gr<9e2Eo
public static void sort(int[] data, int algorithm) { g#=^U`y
impl[algorithm-1].sort(data); R{.wAH(
} Ki-CJy
z$p+l]
public static interface Sort { =Feavyx
public void sort(int[] data); nM8aC&Rd\
} Zl"h-~31
z'r.LBnh
public static void swap(int[] data, int i, int j) { iXC/? EK4
int temp = data; e*vSGT$KgL
data = data[j]; {Z;W|w1t
data[j] = temp; \`x'r$CV
} ]\P
} #UU}lG