[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; 0 rXxRQ
} NCk r /#!
int i1=l; /s[l-1zW
int i2=mid+1; Q'YH>oGh^
for(int cur=l;cur<=r;cur++){ kLni{IYN7
if(i1==mid+1) \e'R@
data[cur]=temp[i2++]; }`v~I4i
else if(i2>r) {jho&Ai
data[cur]=temp[i1++]; RQ'H$r.7g
else if(temp[i1] data[cur]=temp[i1++]; D[mSmpjE6&
else we;G]`@?
data[cur]=temp[i2++]; mysetv&5
} CO2C{~Q5
} l-s!A(l
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} #z2rzM@/:
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改进后的归并排序: bLQ ^fH4ww
J]G?Rc
package org.rut.util.algorithm.support; 1}:bqI.<W
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import org.rut.util.algorithm.SortUtil; V {pj~D.E
lI-L` x
/** o_D?t-XH
* @author treeroot -R%<.]fJ
* @since 2006-2-2 7A\~)U@
* @version 1.0 #L{OV)a<
*/ 3'c0#h@VD
public class ImprovedMergeSort implements SortUtil.Sort { N\#MwLm
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private static final int THRESHOLD = 10; e=Z, Jg
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/* ;zIP,PMM
* (non-Javadoc) spGB)k,^
* |/2y-[;:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yI ld75S`
*/ eXKo.JL
public void sort(int[] data) { B|4X}*@SX
int[] temp=new int[data.length]; hlJq-*6'
mergeSort(data,temp,0,data.length-1); rfgI$eu
} S6+y?,^
Bnb#{tL
private void mergeSort(int[] data, int[] temp, int l, int r) { u)V#S:9]
int i, j, k; q&Gz ]
int mid = (l + r) / 2; eOXHQjuj
if (l == r) &p}$J)q
return; n%k!vJ)]
if ((mid - l) >= THRESHOLD) %c [F;ug
mergeSort(data, temp, l, mid); BwBm[jtP
else YQpSlCCo 3
insertSort(data, l, mid - l + 1); h~p>re
if ((r - mid) > THRESHOLD) Yb/i{@AJ
mergeSort(data, temp, mid + 1, r); tX@_fYb
else F8uNL)gKj)
insertSort(data, mid + 1, r - mid); kH4Ai3#g
CMCO}#
for (i = l; i <= mid; i++) { |R56ho5C
temp = data; e?Ho a$k
} 98WZ){+,m
for (j = 1; j <= r - mid; j++) { ;Y;qg
temp[r - j + 1] = data[j + mid]; 59!Fkd3
} LNa$ X5`
int a = temp[l]; qOUqs'7/]
int b = temp[r]; g+ MdHn[
for (i = l, j = r, k = l; k <= r; k++) { #F*1V(!
if (a < b) { ,daKC
data[k] = temp[i++]; sz)oZPu|
a = temp; ']>Mp#j
} else { E6,4RuCK
data[k] = temp[j--]; Z0*ljT5|
b = temp[j]; <6fv1d+v
} *0|IXGr
} +{/*z
} Q^q1ns;r
~",`,ZXQy
/** :{ur{m5bX
* @param data 8Y_ol#\L
* @param l Vg>( Y,
* @param i U R%4@
*/ i-'9AYyw
private void insertSort(int[] data, int start, int len) { K"0PTWt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >NKe'q<)3
} q-`RI*1]
} KrXdnY8
} gt ";2,;X
} $ KRI'4
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堆排序： 2Y>~k{AN%
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package org.rut.util.algorithm.support; z9p05NFH
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import org.rut.util.algorithm.SortUtil; *$"gaXI
v\,N5
/** =e}H'5?!
* @author treeroot 2PeR
* @since 2006-2-2 @0eHS+
* @version 1.0 }?@rO`:EF+
*/ 0z[dlHi
public class HeapSort implements SortUtil.Sort{ 2<][%> '
(^5 7UmFv]
/* (non-Javadoc) X5]TY]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HoLv`JA
*/ *5wu
public void sort(int[] data) { nD0}wiL{
MaxHeap h=new MaxHeap(); #!9S}b$
h.init(data); rx5B=M
for(int i=0;i h.remove(); 7-~Q5Kr.
System.arraycopy(h.queue,1,data,0,data.length); $&=p+
} R@*O!bD
TP}h~8 /;
private static class MaxHeap{ O0:)X)b
+e-,ST&w(
void init(int[] data){ S8l1"/?aHE
this.queue=new int[data.length+1]; c=;:R0_'t
for(int i=0;i queue[++size]=data; 8`]=C~G
fixUp(size); (Si=m;g
} P1U*g!
} +@Ad1fJi
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private int size=0; ?|1Mv1C?
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private int[] queue; )g|xpb
a6h>=uT [
public int get() { e2+BWKaU
return queue[1]; +'G0{;b
} m$LVCB
ZO7&vF}
public void remove() { ur\qOX|{
SortUtil.swap(queue,1,size--); 68iV/7
fixDown(1); tj*y)28-
} /?6gdN
file://fixdown M0' a9.d
private void fixDown(int k) { G\;}w
int j; '&FjW-`" G
while ((j = k << 1) <= size) { 7Mx6
if (j < size %26amp;%26amp; queue[j] j++; +"ueq
if (queue[k]>queue[j]) file://不用交换 cM&2SRBZ
break; Q*YYTmZ
SortUtil.swap(queue,j,k); @f!AkzI
k = j; ^#):c`
} vMs;>lhtg
} ,WQ^tI=O
private void fixUp(int k) { =l9T7az
while (k > 1) { &W6^6=E{g
int j = k >> 1; 7$k8%lI;>
if (queue[j]>queue[k]) Pz_NDI
break; tQ~WEC
SortUtil.swap(queue,j,k); \]Dt4o*yZ
k = j; I<=Df5M
} s-W[.r|
} Y e+Ay
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} oA tsUF+a
C*I(|.i@
} w# *1/N
%@R~DBS
SortUtil： XMRNuEU
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package org.rut.util.algorithm; @ 2_<,;$
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import org.rut.util.algorithm.support.BubbleSort; ]bgY6@M
import org.rut.util.algorithm.support.HeapSort; #*c F8NV-
import org.rut.util.algorithm.support.ImprovedMergeSort; 'ZQWYr9R
import org.rut.util.algorithm.support.ImprovedQuickSort; S)A'Y]2X
import org.rut.util.algorithm.support.InsertSort; H<ZU#U0FZf
import org.rut.util.algorithm.support.MergeSort; lM#A3/=K
import org.rut.util.algorithm.support.QuickSort; O}#yijU3e
import org.rut.util.algorithm.support.SelectionSort; &s)0z)mR8&
import org.rut.util.algorithm.support.ShellSort; 3,);0@I
7W9~1 .SC
/** G_Ay
* @author treeroot m=b~i^@
* @since 2006-2-2 gor<g))\
* @version 1.0 }'=h4yI
*/ z{BA4sn
public class SortUtil { m_!U}!
public final static int INSERT = 1; NNa1EXZ[
public final static int BUBBLE = 2; 2N~E' 25
public final static int SELECTION = 3; z}.D" P+
public final static int SHELL = 4; cX At:m
public final static int QUICK = 5; 1Qh`6Ya f
public final static int IMPROVED_QUICK = 6; Z0fJ9HW
public final static int MERGE = 7; 2 [!Mx&^
public final static int IMPROVED_MERGE = 8; P`'$
public final static int HEAP = 9; OK`Z@X_,bW
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public static void sort(int[] data) { q2_`v5t
sort(data, IMPROVED_QUICK); _a+ICqR
} "L3Xd][
private static String[] name={ TRKgBK$,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %HSl)zEo>C
}; u{bL-a8}
MFg'YA2/
private static Sort[] impl=new Sort[]{ C%ytkzG_
new InsertSort(), 5@XV6
new BubbleSort(), S;A)C`X&
new SelectionSort(), ^p_u.P
new ShellSort(), o6?l/nJ
new QuickSort(), 2[dIOb4b
new ImprovedQuickSort(), g]`bnZ7
new MergeSort(), $`vkw(;t)1
new ImprovedMergeSort(), y,<$X.>QO|
new HeapSort() ,.g}W~S)
}; o&^NwgRCF
cD{8|B*
public static String toString(int algorithm){ 9B)lGLL}q
return name[algorithm-1]; xaL#MIR"u"
} x.EgTvA&d
h)E|?b_
public static void sort(int[] data, int algorithm) { eO{@@?/y
impl[algorithm-1].sort(data); u fw cF*
} W3LP ~
D{AFL.r{
public static interface Sort { " OGdE_E
public void sort(int[] data); vSM_]fn
} DzPs!(5[I
}f}IA\8]
public static void swap(int[] data, int i, int j) { i<u9:W
int temp = data; n9fk,3
data = data[j]; \>)f5 gV@
data[j] = temp; +AK:(r
} K&UE0JO'
} B <+K<,S